WO2001095993A2 - Filtration systems and fitting arrangements for filtration systems - Google Patents

Filtration systems and fitting arrangements for filtration systems Download PDF

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Publication number
WO2001095993A2
WO2001095993A2 PCT/US2001/015369 US0115369W WO0195993A2 WO 2001095993 A2 WO2001095993 A2 WO 2001095993A2 US 0115369 W US0115369 W US 0115369W WO 0195993 A2 WO0195993 A2 WO 0195993A2
Authority
WO
WIPO (PCT)
Prior art keywords
filter
manifold
fittings
carriage
nozzle
Prior art date
Application number
PCT/US2001/015369
Other languages
French (fr)
Other versions
WO2001095993A3 (en
Inventor
Hajime Hiranaga
Tatauya Hoshino
Itoh Hiromichi
Original Assignee
Pall Corporation
Koganei Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pall Corporation, Koganei Corporation filed Critical Pall Corporation
Priority to KR1020027015198A priority Critical patent/KR100850340B1/en
Priority to DE60117260T priority patent/DE60117260T2/en
Priority to EP01939021A priority patent/EP1286746B1/en
Priority to JP2002510166A priority patent/JP4649092B2/en
Priority to US10/275,862 priority patent/US7338599B2/en
Publication of WO2001095993A2 publication Critical patent/WO2001095993A2/en
Publication of WO2001095993A3 publication Critical patent/WO2001095993A3/en
Priority to US12/018,548 priority patent/US7807055B2/en
Priority to US12/885,601 priority patent/US8293104B2/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D36/00Filter circuits or combinations of filters with other separating devices
    • B01D36/001Filters in combination with devices for the removal of gas, air purge systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D27/00Cartridge filters of the throw-away type
    • B01D27/08Construction of the casing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13Supported filter elements
    • B01D29/15Supported filter elements arranged for inward flow filtration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/902Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding containing fixed liquid displacement elements or cores
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/96Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D35/00Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/30Filter housing constructions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2201/00Details relating to filtering apparatus
    • B01D2201/30Filter housing constructions
    • B01D2201/301Details of removable closures, lids, caps, filter heads
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2201/00Details relating to filtering apparatus
    • B01D2201/34Seals or gaskets for filtering elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2201/00Details relating to filtering apparatus
    • B01D2201/40Special measures for connecting different parts of the filter
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2201/00Details relating to filtering apparatus
    • B01D2201/40Special measures for connecting different parts of the filter
    • B01D2201/4015Bayonet connecting means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2201/00Details relating to filtering apparatus
    • B01D2201/40Special measures for connecting different parts of the filter
    • B01D2201/4023Means for connecting filter housings to supports
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2201/00Details relating to filtering apparatus
    • B01D2201/40Special measures for connecting different parts of the filter
    • B01D2201/4046Means for avoiding false mounting of different parts

Definitions

  • the present invention relates to filtration systems and fitting arrangements for filtration systems which may be used in a wide variety of applications including, for example, the filtration of a photo-resist liquid.
  • the filtration system may include a manifold connected to a pump which pumps the photo-resist liquid through the system.
  • a filter which has one or more fittings may be mounted to corresponding fittings on the manifold.
  • conventional equipment used to mount the filter to the manifold is often relatively large and occupies more space than is conveniently available.
  • conventional mounting equipment can cause undue stress on the fittings, and potentially damage the fittings, because it fails to properly align the fittings as the filter is mounted to the manifold.
  • conventional mounting equipment is frequently difficult to access and maintain, often requiring disassembly of the manifold.
  • the fittings can also be mismatched due to variations in their dimensions and eccentricity. Coupling mismatched fittings can also produce undue stresses on the fittings due to misalignment.
  • the mated fittings of many conventional systems have large volumes which collect or trap the photo-resist liquid, e.g., hold up volumes and leakage volumes. These hold up volumes and leakage volumes are expensive because the expensive liquid trapped in them is discarded when the filter, is replaced on the manifold. Further, the flow of fluid can stagnate in these hold up volumes and leakage volumes. When a liquid such as a photo-resist liquid stagnates, it can undergo chemical and/or physical changes which can be detrimental to the fabrication process.
  • the present invention overcomes many problems associated with conventional filtration systems and fitting arrangements for filtration systems, including one or more of the problems previously described.
  • the filtration system comprises a manifold, a filter, a carriage and a mounting mechanism.
  • the manifold has at least one fitting and the filter has at least one fitting.
  • the carriage supports the filter.
  • the mounting mechanism is operatively associated with the carriage to move the carriage between a first position wherein the filter is spaced from the manifold and a second position wherein the fitting of the filter engages the fitting of the manifold.
  • a fitting arrangement comprises a manifold having a first fitting and a filter having a second fitting.
  • One of the first and second fittings comprises a nozzle having a tip portion, and the tip portion includes a contact surface.
  • the other of the first and second fittings comprises a receptacle having a contact surface. The first and second fittings are engageable and the contact surface of the first fitting seals against the contact surface of the second fitting.
  • Figure 1 is a front view of a filtration system showing a manifold and a capsule filter disengaged.
  • Figure 2 is a side view of the filtration system of Figure 1.
  • Figure 3 is a top view of the filtration system of Figure 1.
  • Figure 4 is a front view of the filtration system of Figure 1 showing the manifold and the capsule filter engaged.
  • Figure 5 is a partially sectioned top view of an alternative base assembly of the filtration system of Figure 1.
  • Figure 6 is a partially sectioned side view of the base assembly of Figure 5 and a capsule filter mounted on the base assembly.
  • Figure 7 is a partially sectioned top view of an alternative base assembly of the filtration system of Figure 1.
  • Figure 8 is a side view of an alternative filtration system.
  • Figure 9 is a partially sectioned front view of the filtration system of Figure 8.
  • Figure 10 is a top view of the filtration system of Figure 8.
  • Figure 11 is a rear view of an upper portion of the filtration system of
  • Figure 12 is a partially cutaway rear view of an upper portion of the filtration system of Figure 8.
  • Figure 13 is a top view of the manifold of the filtration system of Figure 8.
  • Figure 14 is a partially cutaway side view of an alternative mounting mechanism.
  • Figure 15 is a top view of the mounting mechanism of Figure 14.
  • Figure 16 is a partially cutaway side view of an alternative mounting mechanism.
  • Figure 17 is a top view of the mounting mechanism of the Figure 16.
  • Figure 18 is a partially cutaway side view of an alternative mounting mechanism.
  • Figure 19 is a side view of the rotatable head of the mounting mechanism of Figure 18.
  • Figure 20 is a top view of the mounting mechanism of Figure 18.
  • Figure 21 is a partially cutaway side view of a centering mechanism.
  • Figure 22 is a sectional side view of an alternative centering' mechanism.
  • Figure 23 is a partially cutaway top view of a portion of the centering mechanism of Figure 22.
  • Figure 24 is a front view of a filtration system having an alternative disengagement mechanism showing a manifold and a capsule filter disengaged.
  • Figure 25 is a front view of the filtration system of Figure 24 showing the manifold and the capsule filter engaged.
  • Figure 26 is a sectional view of a nozzle/receptacle arrangement showing the nozzle and the receptacle disengaged.
  • Figure 27 is a sectional view of the nozzle/receptacle arrangement of Figure 26 showing the nozzle and receptacle engaged.
  • Figure 28 is ' a sectional view of an alternative nozzle/receptacle arrangement showing the nozzle and the receptacle disengaged.
  • Figure 29 is a sectional view of the nozzle/receptacle arrangement of Figure 28 showing the nozzle and the receptacle engaged.
  • Figure 30 is a sectional view of an alternative nozzle/receptacle arrangement showing the nozzle and the receptacle disengaged.
  • Figure 31 is a sectional view of the nozzle/receptacle arrangement of Figure 30 showing the nozzle and the receptacle engaged.
  • Figure 32 is a sectional view of an alternative nozzle/receptacle arrangement showing the nozzle and receptacle disengaged.
  • Figure 33 is a sectional view of the nozzle/receptacle arrangement of
  • Figure 32 showing the nozzle and receptacle engaged.
  • Figure 34 is a sectional view of an alternative nozzle/receptacle arrangement showing the nozzle and the receptacle disengaged.
  • Figure 35 is a sectional view of the nozzle/receptacle arrangement of Figure 34 showing the nozzle and the receptacle engaged.
  • Figure 36 is a sectional view of an alternative nozzle/receptacle arrangement showing the nozzle and the receptacle disengaged.
  • Figure 37 is a sectional view of the nozzle/receptacle arrangement of Figure 36 showing the nozzle and the receptacle engaged.
  • Figure 38 is a sectional view of an alternative nozzle/receptacle arrangement.
  • Figure 39 is a sectional view of an alternative nozzle/receptacle arrangement.
  • Figure 40 is a sectional view of an alternative nozzle/receptacle arrangement.
  • Figure 41 is a sectional view of an alternative nozzle/receptacle arrangement.
  • Figure 42 is a side view of the capsule filter.
  • Figure 43 is a rear view of the capsule filter of Figure 42.
  • Figure 44 is ' a " top view of the capsule filter of Figure 42.
  • Figure 45 is a sectional side view of the capsule filter of Figure 42.
  • Figure 46 is a side view of a filter cartridge of the capsule filter of Figure 45.
  • Figure 47 is a sectional side view of an alternative capsule filter.
  • Figure 48 is a sectional side view of an alternative capsule filter.
  • Figure 49 is a sectional side view of an alternative bowl of a capsule filter.
  • Figure 50 is a top view of the bowl of Figure 49.
  • Figure 51 is a sectional side view of an alternative bowl.
  • Figure 52 is a top view of the bowl of Figure 51.
  • the filtration system 10 generally comprises a loading/unloading equipment, e.g., a carriage 11, and further comprises a manifold 12 and a filter such as a capsule filter 13.
  • the capsule filter includes a filter medium, and the manifold 12 and the capsule filter 13 may include mating fittings 14, 15, e.g., inlet fittings 14a, 15a, outlet fittings 14b, 15b, and vent fittings 14c, 15c.
  • the carriage 11 supports the capsule filter 13 and is cooperatively arranged with the manifold 12 to mount the capsule filter 13 to the manifold 12 and engage the fittings 15 of the capsule filter 13 with the respective fittings 14 of the manifold 12.
  • a mounting mechanism 16 may be arranged between the carriage 11 and the manifold 12 to move the capsule filter 13, e.g., longitudinally, between a disengaged position, as shown in Figures 1 and 2, and an engaged position, as shown in Figure 4.
  • the capsule filter 13 In the disengaged position, the capsule filter 13 may rest in the carriage 11 and may be spaced from the manifold 12.
  • the capsule filter 13 In the engaged position, the capsule filter 13 engages the manifold 12, and the fittings 14, 15 of the manifold 12 and the capsule filter 13 are sealed to one another.
  • a pump 17 which may be fluidly coupled and even directly attached to the manifold 12, pumps fluid, e.g., a liquid such as a liquid photo resist, into an inlet conduit in the manifold 12, through the inlet fittings 14a, 15 a, and into the capsule filter 13.
  • Gases, such as air contained in the capsule filter 13 or gas bubbles entrained in the liquid, may be vented from the capsule filter 13 via the vent fittings 14c, 15c and a vent conduit 20 of the manifold 12.
  • Filtered liquid is forced by the pump through the filter medium of the capsule filter 13 and out of the capsule filter 13 via the outlet fittings 14b, 15b and an outlet conduit 21 of the manifold 12.
  • the pump 17 may be deactivated and the carriage 11 may be moved, e.g., lowered, by the mounting mechanism 16 to the disengaged position.
  • a disengagement mechanism 22 may be coupled between the capsule filter 13 and the carriage 11 and/or the manifold 12 to disengage the fittings 15 of the filter capsule 13 from the fittings 14 of the manifold 12 as the carriage 11 is lowered.
  • the capsule filter 13 may be disengaged from the manifold 12 manually.
  • the old capsule filter 13 may then be replaced with a new capsule filter 13; the carriage 11 may be moved, e.g., raised, by the mounting mechanism 16 to the engaged position engaging the new capsule 13 with the manifold 12; and the pump 17 may then be reactivated.
  • the carriage 11 may be configured in a wide variety of ways. In may preferred embodiments, the carriage 11 may be arranged to move the capsule filter 13, both into and out of engagement with the manifold 12, in a direction parallel to the axes of the engaged fittings 14, 15. More preferably, the carriage 11 moves the capsule filter 13 in a direction parallel to the axes of the engaged fittings 14, 15 along most of, even more preferably, substantially all of, the distance that the capsule filter 13 travels on the carriage 11. In one example, shown in Figures 1 and 2, the carriage 11 may include a base assembly 23, a top assembly 24, and first and second preferably identical side assemblies 25 which extend between the top assembly 24 and the base assembly 23.
  • the base, top, and side assemblies may each comprise any of a wide array of suitable structures, including multi-piece structures.
  • the base assembly 23 comprises a base 26, such as a base plate, which supports the capsule filter 13 and on which the capsule filter 13 rests.
  • the side assemblies 25 each comprise side plates 30 which are connected to the base 26.
  • the side plates 30 preferably extend parallel to each other closely along the exterior of the sides of the manifold 12 to the top assembly 24.
  • the manifold 12 may include guide channels 29 within which the side plates 30 slide, e.g., upwardly and downwardly, as the carriage 11 moves between the disengaged and engaged positions.
  • the manifold may include pins or rollers which engage slots or tracks on the side plates.
  • the top assembly 24 may comprise a top plate 31 which is connected to the side plates 30 and extends along the top of the manifold 12.
  • the carriage 11 thus surrounds the exterior of the manifold 12 and is preferably accessible for maintenance without having to disturb the manifold 12, e.g., dismantle the manifold 12 from the pump 17.
  • the carriage may comprise a base assembly and opposite side assemblies without a top assembly. The carriage may then be operatively associated with the manifold in any suitable manner, for example, by connecting the side assemblies of the carriage to the sides or the bottom of the manifold via a mounting mechanism.
  • the carriage may be operatively associated with a structure other than the manifold.
  • the carriage when the manifold is attached to a pump, the carriage may also be coupled to the pump, rather than the manifold, and arranged to move the capsule filter between engagement and disengagement with the manifold.
  • the base plate and the side plates comprise a generally U-shaped assembly adapted to support the capsule filter, and the carriage thus comprises a compact, highly space efficient structure for supporting the capsule filter.
  • the carriage and the capsule filter may be installed in a space having a relatively small width, e.g., a width of about 60 millimeters or less, compared to a width of about 140 millimeters or more required for many conventional filter mounting mechanisms.
  • the capsule filter 13 can thus be mounted and dismounted within a 60-millimeter- wide front area.
  • a filtration system embodying the present invention provides a dispensing system that has a high space utilization efficiency but is nonetheless easily accessible and therefore easy to use and maintain.
  • the carriage In the disengaged position, the carriage preferably supports the filter capsule on the base assembly.
  • the filtration system may also include a positioning mechanism which allows the capsule filter to be positioned and oriented on the base assembly with the fittings of the capsule filter at least roughly aligned with the fittings of the manifold.
  • the positioning mechanism may be operatively associated with the carriage and/or the capsule filter and may take a variety of forms.
  • the positioning mechanism 32 is cooperatively arranged with the base 26 and may include a rear wall 33 which limits the rearward movement of the capsule filter 13.
  • the rear wall may extend from the base assembly or from one or both of the side assemblies.
  • the positioning mechanism 32 may include an opening such as an elongated slot 34 which extends within the base 26 from the front edge and a corresponding elongated tab or protrusion 35 which extends from the bottom of the capsule filter 13.
  • the slot 34 and the protrusion 35 may be dimensioned to limit the rearward movement of the capsule filter 13 on the base 26 and/or to angularly orient the capsule filter 13 on the base 26 with the fittings 15, 14 at least roughly aligned with one another. With the capsule filter 13 positioned on the base 26, the capsule filter 13 may slide rearwardly along the base 26 with the protrusion 35 sliding within the slot 34.
  • the close proximity of the sides of the slot 34 and the sides of the protrusion 35 maintain the capsule filter 13 at a desired angular orientation with respect to the manifold 12.
  • the axes of the fittings 14, 15 are at least roughly aligned axially.
  • the capsule filter 13 may then be mounted to the manifold 12 without damaging the fittings 14, 15 due to misalignment.
  • the positioning mechanism is not limited to the embodiment shown in
  • the rear wall may be eliminated and the positioning mechanism may comprise openings such as one or more holes 36 in the base 26 and one or more corresponding protrusions 37 extending from the bottom of the capsule filter 13.
  • the capsule filter 13 is positioned on the base 26 with the protrusions 37 of the capsule filter 13 disposed in the holes 36 of the base 26.
  • the protrusions 37 and the holes 36 are dimensioned and located on the capsule filter 13 and the base 26, respectively, such that when the protrusions 37 are disposed in the holes 36, the fittings 14, 15 of the manifold 12 and the capsule filter 13 are at least roughly aligned axially.
  • the embodiment shown in Figures 5 and 6 has two holes 36 and two protrusions 37.
  • the positioning mechanism may comprise more than two holes and protrusions, e.g., three holes and protrusions spaced from one another in a triangular configuration, or only one hole and protrusion, e.g., an elongated hole 28 (and a corresponding protrusion) as shown in Figure 7.
  • the positioning mechanisms of the illustrated embodiments have been associated with the base assembly, the positioning mechanism may be associated with the carriage in other ways, e.g., with the side assemblies.
  • the mounting mechanism may also take a variety of forms, and one example of a mounting mechanism 16 is shown in Figures 1-4.
  • the mounting mechanism 16 is preferably cooperatively arranged between the carriage 11 and the manifold 12 and in some embodiments may comprise a threaded arrangement including a threaded stud 40 and a mating nut 41, which may be part of a knob 42.
  • the threaded stud 40 may have trapezoidal threads and is preferably fixedly mounted to the top of the manifold 12 extending toward the top assembly 24 of the carriage 11.
  • the nut 41 is correspondingly threaded and is preferably rotatably mounted to the top assembly 24, e.g., the top plate 31, to receive the stud 41 in threaded engagement.
  • the knob 42 is rotated in one direction, the nut 41 moves axially in one direction along the stud 40, e.g., away from the manifold 12, and, in turn, moves the base 26 of the carriage 11 from the disengaged position toward the manifold 12 and the engaged position, where the fittings 15 of the capsule filter 13 engage the fittings 14 of the manifold 12.
  • the nut 41 moves axially in the opposite direction along the stud 40 (e.g., toward the manifold 12) and, in turn, moves the base 26 of the carriage 11 back toward the disengaged position.
  • the threads may be arranged to provide a quick release of the capsule filter 13 from the manifold 12.
  • the threads may be arranged such that turning the knob 42 in the range from about 90 degrees to about 360 degrees may be enough to release the capsule filter 13 from the manifold 12.
  • the mounting mechanism may comprise a threaded stud and a correspondingly threaded portion of the top assembly of the carriage, which receives the threaded stud.
  • One end of the threaded stud may be part of a knob and the opposite end of the stud may bear against, or may be rotatably fixed to, the top of the manifold.
  • This embodiment of the mounting mechanism operates in a manner similar to the mounting mechanism 16 shown in Figures 1-4.
  • FIG. 8-13 Another example of a mounting mechanism 16 is shown in Figures 8- 13.
  • the mounting mechanism 16 shown in Figures 8-13 is preferably cooperatively arranged between the carriage 11 and the manifold 12 and may comprise a pivotable lever arrangement including a lever 51 which is pivotable about a pivot axis 52.
  • the lever may be coupled between the manifold and the carriage in a variety of ways.
  • the lever 51 may be pivotably mounted by pivot pins 53 to a bracket 54 which, in turn, may be mounted to the top of the manifold 12.
  • the lever 51 may be mounted to brackets on the sides of the manifold.
  • the lever 51 may also be mounted to the carriage 11 in a variety of ways, e.g., to the side assemblies 25.
  • the lever 51 is preferably arranged to lift the carriage 11 from the disengaged position toward the engaged position as the lever 51 is lifted and to lower the carriage 11 from the engaged position toward the disengaged position as the lever 51 is lowered.
  • the mounting mechanism 16 may also include a spring arrangement 55 for biasing the lever 51 toward a lifted and/or lowered position, maintaining the carriage 11 in the engaged and/or disengaged position.
  • mounting mechanisms e.g., mounting mechanisms comprising a cam arrangement
  • the mounting mechanism 16 shown in Figures 14 and 15 may comprise a removable or fixed lever 61 connected to a rotatable shaft 62 which, in turn, is rotatably connected to the manifold 12 by a mounting plate 63.
  • the lever 61 extends through a cam slot 64 in a head 65 which may be fixedly attached to the top assembly 24 of the carriage 11, e.g., at the top plate 31.
  • the head 65 and hence the carriage 11 is raised or lowered between the disengaged position and the engaged position.
  • the mounting mechanism 16 may include a pin 66 which extends radially from the rotatable shaft 62.
  • the pin 66 is disposed in the cam slot 64 of the fixed head 65.
  • the cam slot 64 may extend completely through the head 65, as in the embodiment shown in Figure 14, or it may merely extend partially into the inner periphery of the head 65.
  • a structure 67 formed at the end of the shaft 62 may be engaged by a wrench, e.g., an alien wrench, to turn the shaft 62.
  • the shaft may extend axially beyond the head and the protruding end of the shaft may be formed as a knob which may be turned manually.
  • the mounting mechanism 16 may include a nonrotatable shaft 71 fixed to the manifold 12 and having a radially extending pin 72.
  • the pin 72 is disposed in a cam slot 73 of a head 74 which is rotatably attached to the top assembly 24 of the carriage 11 by a mounting plate 75.
  • Holes 76 in the head 75 receive a removable lever 77, e.g., a screwdriver, which can be used to rotate the head 74 on the shaft 71.
  • the lever may be fixed to the head; the head may be formed with a structure that can be turned with a wrench; or the head may be formed as a knob that can be turned manually.
  • the pin 72 rides along the cam slot 73, and the head 74 and hence the carriage 11 is raised or lowered between the disengaged position and the engaged position.
  • the fittings 15 of the capsule filter 13 approach the fittings 14 of the manifold 12.
  • the fittings 14, 15 may be at least roughly aligned by the positioning mechanism.
  • the filtration system 10 may include a centering mechanism which closely aligns the axes of the fittings 14, 15 as they engage one another.
  • the centering mechanism may be configured in a wide variety of ways.
  • the centering mechanism 80 may comprise one or, preferably, a plurality of centering protrusions, e.g., centering pins 81, which fit into corresponding centering apertures 82 as the fittings 14, 15 engage each other.
  • the centering pins 81 may extend upwardly from the capsule filter 13, e.g., the top of the capsule filter 13, and the corresponding centering apertures 82 may be disposed in the manifold 12, e.g., the bottom of the manifold 12.
  • the centering pins 81 may extend from the bottom of the manifold 12 and the centering apertures 82 may be disposed in the top of the capsule filter 13.
  • the centering mechanism 80 is preferably located and dimensioned to ensure that the fittings 14, 15 are closely axially aligned as they sealingly contact one another!
  • the centering pins 81 and apertures 82 may have relatively close tolerances and may be arranged to closely engage one another before the fittings 14, 15 fully contact and are completely sealed to one another. With the centering pins 81 closely engaged with the centering apertures 82, the fittings 14 of the manifold 12 may be moved into full sealing contact with the fittings 15 of the capsule filter 13. The centering mechanism 80 thus prevents incomplete sealing and/or damage to the fittings 14, 15 due to misalignment.
  • the centering mechanism 80 may also serve as a stop, limiting the advance of the fittings 14, 15 within each other and preventing over compression. Alternatively, stops may be provided elsewhere on the manifold and the capsule filter and/or the carriage.
  • the fittings 15 of the capsule filter 13 may be disengaged from the fittings 14 of the manifold 12.
  • the fittings 14, 15 of the manifold and the capsule filter 13 may remain engaged as the carriage 11 is moved to the disengaged position, the base assembly 23 of the carriage 11 moving away from the bottom of the capsule filter 13 as the carriage 11 moves to the disengaged position.
  • the capsule filter 13 may then be removed from the manifold 12, e.g., by manually disengaging the fittings 15 of the capsule filter from the fittings 14 of the mamfold 12.
  • the filtration system 10 may further comprise a disengagement mechanism which is operatively associated with the capsule filter 13 and automatically disengages the fittings 15 of the capsule filter 13 from the fittings 14 of the manifold 12 as the carriage 11 moves toward the disengaged position.
  • the disengagement mechanism may be configured in a variety of ways.
  • the disengagement mechanism may be cooperatively arranged between the capsule filter 13 and the manifold 12.
  • One example of such a disengagement mechanism 22 is shown in Figures 22 and 23 and comprises one or more springs 86 disposed between the capsule filter 13 and the manifold 12.
  • the springs may be positioned in a variety of suitable locations between the capsule filter and the manifold. In the illustrated embodiment, a spring 86 is disposed around each centering pin 81.
  • the springs 86 are compressed around the centering pins 81 as the carriage 11 is lifted to the engaged position by the mounting mechanism 16 and the fittings 15 of the capsule filter 13 are lifted into sealing contact with the fittings 14 of the mamfold 12. As the carriage 11 is lowered to the disengaged position by the mounting mechanism 16, the springs 86 expand and automatically disengage the fittings 14, 15.
  • the centering mechanism 80 also helps to maintain axial alignment of the fittings 14, 15 as the fittings 14, 15 are disengaged by the disengagement mechanism 22.
  • the capsule filter 13 remains on the base assembly 23 of the carriage 11 as the carriage 11 is moved to the disengaged position
  • the' ; disengagement mechanism may be cooperatively arranged between the capsule filter 13 and the carriage 11.
  • a disengagement mechanism 22 is shown in Figures 1 and 4 and comprises one or more push rods 91 disposed between the carriage 11 and the capsule filter 13.
  • the push rods may be positioned in a variety of suitable locations between the capsule filter and the carriage.
  • the push rods 91 are disposed in through holes 92 in the manifold 12 between the top of the capsule filter 13 and the top assembly 24 of the carriage 11. The push rods 91 may be lifted along with the capsule filter 13 and the carriage 11 as the carriage 11 is moved to the engaged position by the mounting mechanism 16.
  • the top assembly 24 of the carriage 11 may bear against the push rods 91.
  • the push rods 91 bear against the top of the capsule filter 13, forcing the capsule filter 13 away from the manifold 12 and automatically disengaging the fittings 14, 15.
  • the capsule filter 13 remains on the base assembly 23 of the carriage 11 as the carriage 11 is moved to the disengaged position.
  • the disengagement mechanism 22 generally comprises a . fitment which physically couples the capsule filter 13 and the carriage 11 as the carriage 11 moves between the engaged position and the disengaged position.
  • the fitment niay be structured in a wide variety ofways.
  • the fitment 96 comprises the engagement of the base assembly 23 of the carriage 11 with the capsule filter 13, e.g., with a flange 97 extending from the protrusion 35 in the bottom of the capsule filter 13 past the edges of the slot 34 in the base 26.
  • the base 26 of the carriage 11 bears against the flange 97 of the capsule filter 13, forcing the capsule filter 13 away from the manifold 12 and automatically disengaging the fitting 15 of the capsule filter 13 from the fittings 14 of the manifold 12.
  • the capsule filter 13 remains on the base assembly 23 of the carriage as the carriage 11 is moved to the disengaged position.
  • Another example of a fitment is a flange which extends from each side assembly of the carriage over the top of the capsule filter. As the carriage is lowered by the mounting mechanism, the flanges of the side assemblies may bear against the top of the capsule filter, automatically disengaging the capsule filter from the manifold.
  • the manifold 12 may also be configured in a wide variety ofways.
  • the manifold may have any regular or irregular shape.
  • the manifold 12 may have a box-shaped configuration including a front 100, a back 101, a top 102, a bottom 103 and opposite sides 104, 105.
  • the manifold 12 may further include one or more conduits for transporting fluid to and/or fromthe capsule filter. Each of the conduits is preferably configured to reduce hold up volume and to avoid dead volumes or zones where the fluid can stagnate.
  • the manifold 12 is fluidly coupled to a pump 17.
  • the manifold 12 may be directly attached to the pump 17, e.g., along the back 101 of the manifold 12.
  • the outlet of the pump 17 may be connected to an inlet conduit of the manifold 12 which extends through the manifold 12 and fluidly communicates, in turn, with the inlet fittings 14a, 15a of the manifold 12 and the capsule filter 13.
  • the inlet conduit may be at least partially external to the manifold, e.g., extending externally from the pump to the manifold and hence to the inlet fittings.
  • the manifold 12 may also include an outlet conduit 21 which fluidly communicates between the outlet fittings 14b, 15b and any other appropriate component of the fluid system downstream of the manifold 12.
  • the outlet conduit 21 may extend from the outlet fittings 14b, 15b through the manifold 12 to the front 100 of the manifold 12.
  • the outlet conduit may extend from any portion of the manifold, including the top of the manifold.
  • the manifold 12 may further include a vent conduit 20 which fluidly communicates between the vent fittings 14c, 15c and any appropriate reservoir for the vented gas.
  • the vent conduit 20 may extend from the vent fittings 14c, 15c through the manifold 12 to the front 100 of the manifold 12.
  • the vent conduit may extend from any portion of the manifold, including the top of the manifold.
  • the vent conduit, as well as the vent fittings may be eliminated entirely.
  • the number and configuration of the fittings 14 of the manifold 12, as well as the fittings 15 of the capsule filter 13, may be widely varied.
  • the manifold 12 has three fittings 14a, 14b, 14c.
  • a manifold may have more than three fittings or fewer than three fittings.
  • the manifold may have two fittings or only a single fitting.
  • the fittings 14 of the manifold 12, as well as the fittings 15 of the filter cartridge 13, may be structured in a variety of ays.
  • the fittings may be arranged in any regular or irregular pattern, such as a triangular pattern.
  • the fittings 14, 15 are generally aligned.
  • the spacing between the fittings, or the pattern of the fittings may be symmetric but is preferably not symmetric.
  • the distance between the vent fittings 14c, 15c and the outlet fittings 14b, 15b may be less than the distance between the outlet fittings 14b, 15b and the inlet fittings 14a, 15a.
  • a unsymmetric spacing or pattern helps to prevent the capsule filter from being installed "backwards" on the mamfold.
  • each of the fittings may comprise a nozzle or a port or receptacle which receives a nozzle.
  • Some of the fittings on the manifold, or the capsule filter, may comprise nozzles while others comprise receptacles, or all of the fittings on the mamfold may comprise nozzles or receptacles.
  • the fittings 14a, 14tf, 14c of the manifold 12 all preferably comprise nozzles 110 and the fittings 15a, 15b, 15c of the capsule filter 13 all preferably comprise corresponding receptacles 111 which receive the nozzles 110 of the manifold 12.
  • a wide assortment of nozzles and receptacles are suitable.
  • the nozzle preferably includes a tip portion which contacts, and more preferably seals against, a corresponding surface in the receptacle.
  • a tip portion which contacts, and more preferably seals against, a corresponding surface in the receptacle.
  • gaps or leakage volumes at the ends of the nozzles are eliminated, reducing the hold up volume and minimizing stagnant flow areas or dead zones within the filtration system, and the filtration system may be made smaller.
  • at least the tip portion of the nozzle and the contact surface of the receptacle are preferably formed from different materials, one harder and the other of similar hardness or, more preferably, somewhat softer or more deformable.
  • the softer material deforms to the harder material, forming a highly effective seal.
  • the sealing engagement of the contact surface of the tip portion of the nozzle and the contact surface of the receptacle is preferably free of any additional sealing member, such as a gasket, at the contacting surfaces and may comprise the only or the primary seal between the fittings.
  • additional seals spaced from the contacting surfaces such as a supplemental O-ring seal, may also be provided between the nozzle and the receptacle.
  • the seal formed by the contact surfaces may, for example, prevent any dead zones or stagnant portions from developing at the ends of the nozzle, while the supplemental O- ring seal may ensure a liquid and/or air tight seal between the fittings.
  • Either the tip portion of the nozzle or the contact surface of the receptacle may be formed from the harder material or the softer material. Because the capsule filter is preferably disposable and the manifold is preferably reusable, it is preferable to form the fitting on the manifold, e.g., either the nozzle or the receptacle on the manifold, from the harder material.
  • harder materials include metal, such as stainless steel, and polymeric materials, such as polyethylene, e.g., HDPE, polypropylene, PFA, ETFE, ECTFE, and PCTFE (polychlorotrifmoroethylene), which may be relatively harder than the material in the corresponding fitting.
  • polyethylene e.g., HDPE, polypropylene, PFA, ETFE, ECTFE, and PCTFE (polychlorotrifmoroethylene
  • softer materials include elasomeric-type materials, such as rubber, silicone, and polyurethane
  • polymeric materials such as LDPE, FEP, PFA and PTFE, which may be relatively softer than the material of the corresponding fitting.
  • any suitable combination of relatively hard and relative soft materials may be used for the nozzle/receptacle arrangements based, for example, on a shore hardness D-scale, where PTFE is in the range from about 50 to about 56; ETFE is about 75; FEP is about 55; PFA is about 60; PCTFE is about 90; ECTFE is about 75; PVDF is in the range from about 70 to about 80; LDPE is in the range from about 40 to about 50; and HDPE and UHMWPE are in the range from about 60 to about 70.
  • PTFE is in the range from about 50 to about 56
  • ETFE is about 75
  • FEP is about 55
  • PFA is about 60
  • PCTFE is about 90
  • ECTFE is about 75
  • PVDF is in the range from about 70 to about 80
  • LDPE is in the range from about 40 to about 50
  • HDPE and UHMWPE are in the range from about 60 to about 70.
  • the nozzles and receptacles may be structured in numerous ways. (Components of the embodiments shown in Figures 26-41 have the same reference numbers as the analogous components of the embodiments shown in Figures 1-25.) Some of the many examples of nozzle/receptacle arrangements are illustrated in Figures 26-41. In each of the illustrated embodiments, the nozzle is operatively associated with the manifold and the corresponding receptacle is operatively associated with the capsule filter. However, one or more of the nozzles may alternatively be associated with the capsule filter while the conesponding receptacle is associated with the manifold.
  • the manifold 12 may comprise a body 115, e.g., a polymeric body, and may further comprise a bottom plate 116, e.g., a metal plate, mounted to the body 115.
  • a nozzle 110 which is preferably unitarily formed with the body 115, extends through an aperture 118 in the bottom plate 116.
  • a conduit 119 e.g., an inlet, outlet, or vent conduit, extends through the body 115 and the nozzle 110, opening in the tip portion 120 of the nozzle 110.''
  • the receptacle 111 of the capsule filter 13 may comprise a collar 126, e.g., a polymeric collar, which has a region defining a bore 127.
  • a seat 128, which preferably comprises a separate insert, may be positioned within the bore 127 on a ledge 129 of the collar 126.
  • the seat 128 may be formed from a material different from the material of the nozzle 110 and also different from the material of the collar 126, the seat 128 being preferably formed from a material which is softer or harder than the material of the nozzle 110 or the collar 126.
  • the seat 128 may be formed from PTFE while the nozzle 110 and the collar 126 may be formed from polyethylene, PFA or
  • a seal such as an O-ring 130, may be positioned in the bore 127 on a rim of the seat 128 and around the interior of the collar 126.
  • a cap 131 may be mounted to the collar 126 over the O-ring 130.
  • the cap 131 has an opening 132 which is large enough to receive the nozzle 110.
  • a conduit 133 extends through the collar 126 and at least partially through the seat 128 and opens onto the opening 132 in the cap 131.
  • the tip portion 120 of the nozzle 110 and the seat 128 each have a contact surface 140, 142 which may be similarly or differently shaped.
  • the configuration of each contact surface 140, 142 may vary.
  • the contact surfaces 140, 142 of the tip portion 120 and the seat 128 may have curved or tapered configurations such as a spherical or conical configuration or a flat annular configuration.
  • the area of the contact surfaces 140, 142 may be relatively wide but in many preferred embodiments, the area of at least one of the corresponding contact surfaces 140, 142 may be relatively narrow.
  • the O-ring 130 seals against the nozzle 110.
  • the O-ring 130 may also seal again the rim of the seat 128, the inner wall of the collar 126 and/or the cap 131.
  • the contact surfaces 140, 142 of the nozzle 110 and the receptacle 111 engage and at least the softer surface, e.g., the contact surface 142 of the seat 128, preferably deform to effectively seal against the harder surface, e.g., the contact surface 140 of the tip portion 120 of the nozzle 110.
  • the seat 128 As the nozzle 110 bears against the seat 128, not only does the contact surface 142 of the seat 128 seal against the contact surface 140 of the nozzle 110, but the seat 128 also deforms and seals against the collar 128, e.g., against the ledge 129 and/or the inner wall of the bore 127 of the collar 126.
  • the seat 128 By contacting and sealing the seat 128 against the tip portion 120 of the nozzle 110 and the collar 126 of the receptacle 111, no gaps or leakage volumes are created which can hold up fluid and cause dead zones or stagnant flow areas.
  • the channel defined by the conduits 119, 133 extending through the nozzle 110 and the receptacle 111 provides a flow path free of hold up volumes, leakage volumes, and dead zones, as shown in Figure 27.
  • the nozzle/receptacle arrangement provides a more reliable filtration system 10 and facilitates manufacture of the manifold 12 and the capsule filter 13.
  • the dimensional variations associated with the axial length of the nozzles 110 e.g., from the bottom plate 116 to the tip portion 120, may mean that nozzles 110 on the same manifold 12 have different lengths. This variation may be accommodated by the deformation of the seat 128. Longer nozzles 110 may deform the seat 128 slightly more than shorter nozzles 110 while both adequately seal the fittings.
  • eccentricities in the alignment and/or spacing of the nozzles 110 on the same manifold 12 may be accommodated by the deformation of the seat 128 and the use of an insert for the seat 128, or the nozzle 110.
  • the seat 128 and/or the nozzle 110 may be arranged to move laterally as the fittings 14, 15, including the contact surfaces 140, 142, contact one another.
  • the outer diameter of the seat 128 may be slightly smaller than the diameter of the bore 127 in the collar 126, e.g., by about 0.2 mm.
  • the fittings 14, 15, including the mating tapered contact surfaces 140, 142 engage one another, they laterally adjust the position of the seat 128 within the bore 127, centering the seat 128 on the nozzle 110.
  • any slight tilt of the axis of the nozzle 110 may be accommodated by an asymmetrical deformation of the seat 128 about the axis of the nozzle 110. Similar variations and eccentricities in the receptacle may also be accommodated. By accommodating these variations and eccentricities, abnormal stresses and strains on the nozzles and receptacles may be relieved, providing a more reliable filtration system. Further, neither the mamfold nor the capsule filter need be manufactured to extremely tight tolerances, reducing the cost of manufacture.
  • FIG. 28-41 Other examples of the nozzle/receptacle arrangements are shown in Figures 28-41 and may provide similar and/or additional features and advantages.
  • Components of the embodiments shown in Figures 28-41 have the same reference numbers as the analogous components of the embodiment shown in Figures 26 and 27.
  • the embodiment shown in Figures 28 and 29 is very similar to the embodiment shown in Figures 26 and 27.
  • ridges 145 may extend from the ledge 129 of the collar 126 toward the seat 128.
  • the engagement of the contacting surfaces 140, 142 of the nozzle 110 and the receptacle 111 deforms the ridges 145 and/or drives the ridges 145 into the seat 128 to better seal the seat 128 to the collar 126.
  • the ridges may extend from the seat toward the ledge of the collar and may deform and/or be driven into and seal against the ledge as the nozzle engages the receptacle.
  • the seat 128 may comprise a unitary portion of the collar 126 rather than an insert.
  • the nozzle 110 preferably comprises an insert sealed to the body 115 of the mamfold 12, e.g., by an O-ring 146 disposed in a bore 147 at the upper end of the nozzle insert.
  • the nozzle 110 may be formed from a different material, e.g., a harder material, than the collar 126 of the receptacle 111 and/or from a different material than the body 115 of the manifold 12.
  • Variations and eccentricities may be accommodated by movement of the insert and by deformation of one or both contacting surfaces, in a manner similar to that previously described.
  • variation in the length of the nozzles 110 may be accommodated by axial compression of the O-ring 146.
  • the contact surfaces 140, 142 are preferably semi-spherical and may have a relatively broad contact area.
  • both the nozzle 110 and the seat 128 may comprise inserts.
  • the O-ring 146 sealing the nozzle insert is disposed in a groove 147 around the outer periphery of the insert.
  • ridges 149 may be disposed between the nozzle insert and the body 115 of the manifold 12, in addition to the ridges 145 between the seat insert and the ledge
  • the ridges 149 may extend from the body toward the nozzle insert or from the nozzle insert toward the body.
  • the engagement of the contacting surfaces 140, 141 deforms the ridges 145, 149 and/or drives the ridges 145, 149 into the inserts to better seal the seat and nozzle inserts.
  • the embodiment shown in Figures 34 and 35 is similar to the embodiment shown in Figures 30 and 31.
  • the receptacle 111 may not include a cap. Rather, the collar 126 may have a rim 150 which faces the manifold 12 and defines the opening 132 in the receptacle 111.
  • the contact surfaces 140, 142 preferably have a conical configuration and at least one of the contact surfaces 140, 142, e.g., the contact surface 142 of the seat 128, may have a relatively narrow contact area, which may enhance the seal between the contact surfaces 140, 142.
  • the embodiment shown in Figures 36 and 37 is similar to both the embodiment shown in Figures 34 and 35 and the embodiment shown in Figures 32 and 33.
  • the contact surface 142 of the seat insert has the relatively narrow contact area.
  • the embodiment shown in Figure 38 may comprise a nozzle 110, e.g., a nozzle insert, which has a groove 155 in the outer wall.
  • An O-ring 156 is disposed in the groove 155 and provides a seal against the receptacle collar 125 which supplements the sealing engagement of the contact surfaces 140,
  • the embodiment shown in Figure 39 is similar to the embodiment shown in Figure 38.
  • the receptacle 111 may include a cap 131 and a seat insert 128 comprising a spherical contact surface having a relatively narrow contact area.
  • the embodiment shown in Figure 40 is similar to the embodiment shown in Figure 39.
  • the tip portion 120 of the nozzle 110 may have a cylindrical configuration and both contact surfaces 140, 142 may have flat, annular configurations with relatively small contact areas.
  • the embodiment shown in Figure 41 is similar to the embodiment shown in Figure 40.
  • the contact surfaces 140, 142 may have a reverse conical configuration in which the cone converges toward the axis of the nozzle 110 within the nozzle 110.
  • the fittings shown in Figures 26-41 include a nozzle and a corresponding receptacle having mating contact surfaces which preferably serve as a seal, e.g., " a primary seal or even the sole seal, between the fittings.
  • a seal e.g., " a primary seal or even the sole seal
  • other fittings between the manifold and the capsule filter may be used.
  • fittings which are threaded, clamped and/or friction fitted to one another may be used to seal the manifold to the capsule filter.
  • the filters may also be configured in a variety ofways, including, for example, as a capsule filter.
  • a capsule filter 13 is shown in Figures 42-46.
  • the capsule filter 13 generally comprises a housing 160 and a filter cartridge 161 removably or, preferably, permanently disposed in the housing 160.
  • the housing 160 may be formed from any suitably impervious material, e.g., a metal or a polymeric material, and may have any desired shape, e.g., a generally cylindrical shape. In many preferred embodiments, the shape of the housing corresponds' o the shape of the filter cartridge.
  • the housing 160 may comprise a single piece structure but preferably comprises a multi-piece structure.
  • the housing 160 may include a bowl 162 and a head 163 removably or, preferably, permanently attached to the bowl 162.
  • the bowl 162 may include a side wall and a bottom wall.
  • a handle 159 may extend outwardly from the side wall of the bowl 162 and may be used to position the capsule filter 13 on the base assembly of the carriage with the protrusion 35 on the bottom of the capsule filter 13 engaged in the slot in the base.
  • the housing 160 has one or more fittings, e.g., an inlet fitting 15a, an outlet fitting 15b, and a vent fitting 15c.
  • the inlet fitting 15a and the outlet fitting 15b define a fluid flow path through the housing 160.
  • the fittings may be variously configured, e.g., as nozzles.
  • the fittings each comprise receptacles which may be similar to any of the receptacles previously described.
  • One or more of the fittings may be disposed in the bowl, e.g., at the bottom or in the side wall of the bowl.
  • at least one and, more preferably, all of the fittings 15a, 15b, 15c are disposed in the head 163 on the top of the capsule filter 13.
  • the housing 160 preferably contains the filter cartridge 161 within a filter cartridge chamber in the fluid flow path.
  • the filter cartridge preferably includes a filter element 170 having a filter medium, as shown in Figure 46.
  • the filter medium may comprise a solid or hollow porous mass, such as a cylindrical mass of sintered metal particles or a cylindrical mass of bonded and or intertwined fibers, e.g., polymeric fibers.
  • the filter medium may comprise a permeable sheet, e.g., a porous woven or non- woven sheet of fibers, including filaments, or a permeable or porous, supported or unsupported polymeric membrane, and the filter element 170 may have a cylindrical, hollow pleated configuration.
  • the filter medium may be the sole layer of the pleated filter element 170 but is preferably one of two or more layers of a pleated composite further including, for example, one or more drainage layers, pre-filter layers, additional filter layers, substrates, and/or cushioning layers.
  • the pleats of the filter element may extend radially or, preferably, non-radially, as disclosed, for example, in USP 5,543,047 which is incorporated by reference.
  • non-radially extending pleats each have a height greater than (D- d)/2 and less than or equal to (D 2 -d 2 )/[4(d + 2t)] where D and d are the outside and inside diameters, respectively, of the pleated filter element at the crests and roots of the pleat and t is the thickness of a pleat leg.
  • the height of each pleat is in the range from about 70% or 80% to about 100% of (D 2 -d 2 )/[4(d + 2t)].
  • the non-radial pleats may be preferred because there may be little or no space between the pleats, minimizing hold up volume and dead zones.
  • the hollow filter element 170 is preferably disposed between a cage 171 and a core 172.
  • the ends of the filter element 170, the cage 171 and the core 172 may be sealed to end caps 173, 174, e.g., a blind end cap 173 and an open end cap 174.
  • the open end cap 174 has an opening 175 which fluidly communicates with the interior of the hollow filter element 170.
  • the open end cap may be sealed or attached to the housing with the opening in the open end cap, in turn, fluidly communicating with a fitting.
  • the open end cap 174 may be bonded to the head 163 with the outlet fitting 15b preferably fluidly communicating with the interior of the filter element 170 via the opening 175 in the open end cap 174.
  • the inlet fitting 15a preferably fluidly communicates with the exterior of the filter cartridge 161. Flow may then be directed outside in through the filter cartridge 161.
  • the inlet fitting and the outlet fitting may be arranged to fluidly communicate with the interior and the exterior, respectively, of the filter cartridge, and flow may be directed inside out through the filter cartridge.
  • the filter cartridge has been described in terms of a hollow filter element 170 having a pleated filter medium, a cage 171, a core 172 and end caps 173, 174, the filter cartridge is not limited to this embodiment.
  • the filter element may have a filter composite which is spirally wound rather than pleated.
  • the cage and/or the core may be eliminated.
  • one or both end caps may be eliminated, and the ends of the filter element may be bonded directly to the top and/or bottom of the housing.
  • filter cartridges may incorporate filter media comprising permeable hollow fiber media.
  • a capsule filter 13 may comprise a filter cartridge 161 which may include permeable, e.g., porous, hollow fibers 180.
  • the hollow fibers 180 may be contained between end caps 181, 182, e.g., an open end cap 181 and a blind end cap 182.
  • the hollow fibers 180 may be potted in and extend from a partition 183 of the open end cap 181 and loop back to the partition 183, one or both of the ends of the hollow fibers 180 being an open end fluidly communicating with the opening 184 in the open end cap 181.
  • a perforated cage 185 may extend between the end caps 181, 182 around the hollow fibers 180.
  • both end caps may be open end caps and the cage may have no openings, the fluid being directed into the filter cartridge through the open lower end cap, or the cage and the blind end cap may be eliminated.
  • FIG. 48 Another example of a capsule filter 13 comprising permeable hollow fibers 180 is shown in Figure 48.
  • the hollow fibers 180 extend between the partition 183 in the open end cap 181 and the blind end cap 182.
  • One end of each hollow fiber 180 may be blindly potted in the blind end cap 182, while the other end is openly potted in the partition 183 in fluid communication with the opening 184 in the open end cap 181.
  • a perforated cage may or may not extend between the end caps.
  • the interior of the housing is preferably fitted to the ' filter cartridge to minimize hold up volume and dead zones and to enhance fluid flow distribution and rise time within the housing.
  • the interior side wall of the bowl 160 and the exterior of the filter cartridge 161 may be similarly shaped, and the bowl 160 preferably fits closely completely around the filter cartridge 161, defining an annular fluid flow distribution channel between the interior of the bowl 160 and the exterior of the filter cartridge 161.
  • the annular channel is preferably dimensioned to reduce hold up volume and to allow a sweep of fluid flow around and/or axially along the filter cartridge without undue pressure drop between the inlet and outlet fittings.
  • the desired dimensions of the annular channel may be determined empirically based on such factors as, for example, the viscosity of the fluid, the desired flow rates and pressure drop limits and the area of the inlet or outlet, e.g., the inlet fitting or the outlet fitting.
  • the axial cross sectional area of the annular channel may preferably be on the order of, e.g., approximately equal to, the ' area of the inlet nozzle.
  • the interior bottom wall of the bowl 160 and the bottom of the filter cartridge 161 may also be similarly shaped and closely fitted to one another.
  • the bottom of the filter cartridge may completely contact and may be attached to the bottom wall of the bowl, eliminating any space between them.
  • the bottom of the filter cartridge is fitted to the bottom of the housing with one or more lower flow channels extending between them and communicating with the bottom of the annular flow channel.
  • the bottom of the filter cartridge e.g., the bottom of the lower end cap, and/or the interior bottom wall of the housing may have one or more radially extending ribs or spokes. The filter cartridge and the housing may contact one another along the ribs and define the lower channels between them.
  • the interior bottom wall of the housing and or the bottom of the filter cartridge preferably have a surface which is inclined upward to decrease the rise time ofbubbles from the bottom of the filter.
  • the lower flow channels may incline upwardly toward the annular channel, preferably at an angle ofabout 15° or less, e.g., about 10° or less.
  • the lower channels are preferably dimensioned to reduce hold up volume, to allow a sweep of fluid flow between the filter cartridge and the bottom of the housing without undue pressure drop between the inlet and outlet fittings, and/or to facilitate clearance ofbubbles from the bottom of the filter.
  • the desired dimensions of the lower channels, including the degree of incline may be determined empirically based factors such as fluid viscosity, desired flow rates, pressure drop limits and inlet/outlet areas.
  • the interior wall of the head 163 may fit closely to the top of the filter cartridge away from the vent fitting 15c but is preferably at least slightly spaced from the top of the filter cartridge 161 in the vicinity of the vent fitting 15c, allowing gases to rise from the annular flow distribution chamber and over the top of the filter cartridge 161 toward the vent fitting 15c.
  • the space between the interior wall of the head 163 and the top of the filter cartridge 161, e.g., the top of the upper end cap increases continuously from a location most distant from the vent fitting 15c to the vent fitting 15c. Nonetheless, while the space between the interior wall of the head 163 and the top of the filter cartridge 161 is preferably sufficient to vent gas from the capsule filter 13, it is also preferably small enough to avoid excessive hold up volume.
  • the housing may comprise a fluid conduit, e.g., a fluid inlet conduit or a fluid outlet conduit, which extends from one of the fittings axially along the periphery of the filter cartridge chamber and is isolated from the filter cartridge chamber along a substantial length of the conduit, e.g., at least about 50 percent of the length of the conduit.
  • the fluid conduit may be disposed in the bowl, or adjacent to the bowl, and radially beyond the filter cartridge chamber.
  • the fluid conduit extends from a fitting at the top of the housing and opens into the filter cartridge chamber, e.g., the annular flow distribution channel, at the bottom of the housing.
  • the fluid conduit 164 may comprise an inlet conduit extending axially along the periphery of the filter cartridge chamber from the inlet fitting 15a at the top of the housing 160 through the head 163 and the bowl 162 to the bottom of the housing 160.
  • the inlet conduit 164 preferably communicates with the annular fluid flow distribution channel and the filter cartridge chamber only at the bottom of the housing 160 and, therefore, is isolated from the filter cartridge chamber for at least about 70 percent, more preferably at least about 80 percent or at least about 90 percent, of the length of the conduit 164.
  • the housing may also preferably comprise a radial passage through the side wall and/or more preferably in the interior bottom wall of the housing which extends from the side wall of the bowl 162, and fluidly communicates with the axial fluid conduit.
  • the radial passage may extend along the lower end cap or along the bottom wall of the housing or along both, e.g., between the lower end cap and the bottom wall.
  • the radial passage may extend from the bottom of the fluid conduit, under the filter cartridge, e.g., under the lower end cap.
  • the radial passage may extend completely under the filter cartridge but preferably extends only part way under the filter cartridge.
  • the radial passage 165 extends from the bottom of the fluid conduit 164 under the filter cartridge 161, terminating near the center of the filter cartridge chamber of the housing 160.
  • the radial passage 165 may have a uniform cross section or a tapered cross section, e.g., the cross section may decrease with increasing distance from the side wall of the bowl 162.
  • the radial passage 165 may feed fluid to, or receive fluid from, the lower flow channels between the bottom of the filter cartridge 161 and the bottom wall of the bowl 162 and may fluidly communicate between the lower flow channels and the axial fluid conduit.
  • the radial passage may be eliminated, e.g., where there are no longer flow channels between the bottom ⁇ of the filter cartridge and the bottom wall of the bowl.
  • the filter cartridge may comprise a keying mechanism cooperatively arranged between the housing and the filter cartridge to center the filter cartridge in the filter cartridge chamber of the housing and provide a uniform annular flow channel.
  • the keying mechanism may have any " of numerous suitable structures.
  • the keying mechanism may comprise one or more centering pins and mating centering apertures on the housing and the filter cartridge similar to the centering mechanism 80 previously described.
  • the end caps e.g., the lower end cap and the corresponding wall of the housing may have mating profiles or shapes which center the filter cartridge in the filter cartridge chamber as the filter cartridge is mounted within the housing.
  • the shapes may, for example, comprise curved or tapered configurations, e.g., a partially spherical, elliptical or conical configuration, on one or both end caps and the corresponding wall of the housing.
  • the lower end cap 173 may have a generally conical configuration which mates with a conical configuration in the interior bottom wall of the bowl 162 of the housing 160.
  • the configurations are located and shaped to center the filter cartridge 161 in the filter cartridge chamber.
  • the head 163 may then be attached to the bowl 162 and the upper end cap 174 of the filter cartridge 161.
  • a keying mechanism such as mating configuration, e.g., conical configuration, in the interior wall of the head 163, e.g., the region of the head 163 near the outlet fitting 15b, and on the upper end cap 174, may center the filter cartridge 161 on the head 163 as well as the bowl 162.
  • the housing including one or more of the axial fluid conduit, the radial passage, and/or the keying mechanism may be fabricated in any suitable manner.
  • a molded bowl 162 is illustrated Figures 49 and 50.
  • the bowl 162 may be molded in two pieces, e.g., a side wall piece 195 and a bottom wall piece 196, and the two pieces 195, 196 may be attached, e.g., welded or bonded, to form the bowl 162.
  • the bowl 162 includes an axial fluid conduit 164, a radial passage 165, a filter cartridge chamber, and a centering configuration 191 in the interior bottom wall of the bowl 162.
  • the housing may be machined.
  • a machined bowl 162 is illustrated in Figures 51 and 52.
  • the machined bowl 162 preferably comprises a unitary piece 197.
  • a filter cartridge chamber and an axial fluid conduit 164 may be bored in the unitary piece 197.
  • a radial passage 165 may be bored through the side wall of the unitary piece 197, and the exterior end of the radial passage 165 may be plugged or fitted with a fitting.
  • Capsule filters having one or more of the axial fluid conduit, the radial passage, and/or the keying mechanism have many advantages and represent a significant advance in the art. These features are even more valuable when combined with the close fit between the housing and the filter cartridge and the non-radial pleats of the filter cartridge.
  • the axial fluid conduit allows the fluid to sweep evenly along the axial length of the filter cartridge from the bottom to the top of vice versa, reducing or eliminating dead zones at the bottom or top of the annular channel.
  • the radial passage coupled to the lower channels under the lower end cap further enhances the even distribution of fluid flow in the annular fluid channel around the filter cartridge and further avoids dead zones at the bottom of the annular channel.
  • the keying mechanism ensures that the filter cartridge is centered in the filter cartridge chamber and provides a uniform annular channel, even further enhancing the even distribution of fluid flow around the filter cartridge.

Abstract

A filtration system (10) comprising a manifold (12) and a filter (13) having fittings (14, 15), wherein a carriage (11) supporting the filter is operatively associated with a mounting mechanism (16) to move the filter from a position spaced from the manifold to a position where the filter engages the fitting of the manifold. A fitting arrangement comprising a manifold and a filter having fittings. One fitting comprises a nozzle (110) having a tip (120) including a contact surface and the other fitting comprises a corresponding receptacle (111).

Description

FILTRATION SYSTEMS AND FITTING ARRANGEMENTS FOR FILTRATION SYSTEMS
This application claims priority based on United States Provisional Application No. 60/203,946 filed May 12, 2000 and United States Provisional Application No. 60/216,696 filed July 7, 2000, both of which are incorporated by reference.
Technical Field The present invention relates to filtration systems and fitting arrangements for filtration systems which may be used in a wide variety of applications including, for example, the filtration of a photo-resist liquid.
Background of the Invention Many fluids, such as photo-resist liquids used in the micro-electronic industry, are exceedingly expensive. These liquids must be filtered immediately prior to being used or impurities in the photo-resist liquids can damage the micro-electronic components being fabricated.
Conventional filtration systems and fitting arrangements for filtration systems have many problems associated with them. For example, the filtration system may include a manifold connected to a pump which pumps the photo-resist liquid through the system. A filter which has one or more fittings may be mounted to corresponding fittings on the manifold. However, conventional equipment used to mount the filter to the manifold is often relatively large and occupies more space than is conveniently available. Also, conventional mounting equipment can cause undue stress on the fittings, and potentially damage the fittings, because it fails to properly align the fittings as the filter is mounted to the manifold. Further, conventional mounting equipment is frequently difficult to access and maintain, often requiring disassembly of the manifold.
The fittings can also be mismatched due to variations in their dimensions and eccentricity. Coupling mismatched fittings can also produce undue stresses on the fittings due to misalignment. In addition, the mated fittings of many conventional systems have large volumes which collect or trap the photo-resist liquid, e.g., hold up volumes and leakage volumes. These hold up volumes and leakage volumes are expensive because the expensive liquid trapped in them is discarded when the filter, is replaced on the manifold. Further, the flow of fluid can stagnate in these hold up volumes and leakage volumes. When a liquid such as a photo-resist liquid stagnates, it can undergo chemical and/or physical changes which can be detrimental to the fabrication process.
Summary of the Invention
The present invention overcomes many problems associated with conventional filtration systems and fitting arrangements for filtration systems, including one or more of the problems previously described.
In accordance with one aspect of the invention, the filtration system comprises a manifold, a filter, a carriage and a mounting mechanism. The manifold has at least one fitting and the filter has at least one fitting. The carriage supports the filter. The mounting mechanism is operatively associated with the carriage to move the carriage between a first position wherein the filter is spaced from the manifold and a second position wherein the fitting of the filter engages the fitting of the manifold.
In accordance with the second aspect of the invention, a fitting arrangement comprises a manifold having a first fitting and a filter having a second fitting. One of the first and second fittings comprises a nozzle having a tip portion, and the tip portion includes a contact surface. The other of the first and second fittings comprises a receptacle having a contact surface. The first and second fittings are engageable and the contact surface of the first fitting seals against the contact surface of the second fitting.
Description of the Drawings Figure 1 is a front view of a filtration system showing a manifold and a capsule filter disengaged. Figure 2 is a side view of the filtration system of Figure 1. Figure 3 is a top view of the filtration system of Figure 1. Figure 4 is a front view of the filtration system of Figure 1 showing the manifold and the capsule filter engaged. Figure 5 is a partially sectioned top view of an alternative base assembly of the filtration system of Figure 1.
Figure 6 is a partially sectioned side view of the base assembly of Figure 5 and a capsule filter mounted on the base assembly.
Figure 7 is a partially sectioned top view of an alternative base assembly of the filtration system of Figure 1.
Figure 8 is a side view of an alternative filtration system. Figure 9 is a partially sectioned front view of the filtration system of Figure 8.
Figure 10 is a top view of the filtration system of Figure 8. Figure 11 is a rear view of an upper portion of the filtration system of
Figure 8.
Figure 12 is a partially cutaway rear view of an upper portion of the filtration system of Figure 8.
Figure 13 is a top view of the manifold of the filtration system of Figure 8.
Figure 14 is a partially cutaway side view of an alternative mounting mechanism.
Figure 15 is a top view of the mounting mechanism of Figure 14. Figure 16 is a partially cutaway side view of an alternative mounting mechanism.
Figure 17 is a top view of the mounting mechanism of the Figure 16. Figure 18 is a partially cutaway side view of an alternative mounting mechanism.
Figure 19 is a side view of the rotatable head of the mounting mechanism of Figure 18.
Figure 20 is a top view of the mounting mechanism of Figure 18. Figure 21 is a partially cutaway side view of a centering mechanism. Figure 22 is a sectional side view of an alternative centering' mechanism.
Figure 23 is a partially cutaway top view of a portion of the centering mechanism of Figure 22.
Figure 24 is a front view of a filtration system having an alternative disengagement mechanism showing a manifold and a capsule filter disengaged.
Figure 25 is a front view of the filtration system of Figure 24 showing the manifold and the capsule filter engaged.
Figure 26 is a sectional view of a nozzle/receptacle arrangement showing the nozzle and the receptacle disengaged.
Figure 27 is a sectional view of the nozzle/receptacle arrangement of Figure 26 showing the nozzle and receptacle engaged. Figure 28 is' a sectional view of an alternative nozzle/receptacle arrangement showing the nozzle and the receptacle disengaged.
Figure 29 is a sectional view of the nozzle/receptacle arrangement of Figure 28 showing the nozzle and the receptacle engaged.
Figure 30 is a sectional view of an alternative nozzle/receptacle arrangement showing the nozzle and the receptacle disengaged.
Figure 31 is a sectional view of the nozzle/receptacle arrangement of Figure 30 showing the nozzle and the receptacle engaged.
. Figure 32 is a sectional view of an alternative nozzle/receptacle arrangement showing the nozzle and receptacle disengaged. Figure 33 is a sectional view of the nozzle/receptacle arrangement of
Figure 32 showing the nozzle and receptacle engaged.
Figure 34 is a sectional view of an alternative nozzle/receptacle arrangement showing the nozzle and the receptacle disengaged.
Figure 35 is a sectional view of the nozzle/receptacle arrangement of Figure 34 showing the nozzle and the receptacle engaged. Figure 36 is a sectional view of an alternative nozzle/receptacle arrangement showing the nozzle and the receptacle disengaged.
Figure 37 is a sectional view of the nozzle/receptacle arrangement of Figure 36 showing the nozzle and the receptacle engaged. Figure 38 is a sectional view of an alternative nozzle/receptacle arrangement.
Figure 39 is a sectional view of an alternative nozzle/receptacle arrangement.
Figure 40 is a sectional view of an alternative nozzle/receptacle arrangement.
Figure 41 is a sectional view of an alternative nozzle/receptacle arrangement.
Figure 42 is a side view of the capsule filter.
Figure 43 is a rear view of the capsule filter of Figure 42. Figure 44 is' a" top view of the capsule filter of Figure 42.
Figure 45 is a sectional side view of the capsule filter of Figure 42.
Figure 46 is a side view of a filter cartridge of the capsule filter of Figure 45.
Figure 47 is a sectional side view of an alternative capsule filter. Figure 48 is a sectional side view of an alternative capsule filter.
Figure 49 is a sectional side view of an alternative bowl of a capsule filter.
Figure 50 is a top view of the bowl of Figure 49.
Figure 51 is a sectional side view of an alternative bowl. Figure 52 is a top view of the bowl of Figure 51.
Description of Embodiments *;
One example of a filtration system 10 embodying the invention is shown in Figures 1-4. The filtration system 10 generally comprises a loading/unloading equipment, e.g., a carriage 11, and further comprises a manifold 12 and a filter such as a capsule filter 13. The capsule filter includes a filter medium, and the manifold 12 and the capsule filter 13 may include mating fittings 14, 15, e.g., inlet fittings 14a, 15a, outlet fittings 14b, 15b, and vent fittings 14c, 15c. The carriage 11 supports the capsule filter 13 and is cooperatively arranged with the manifold 12 to mount the capsule filter 13 to the manifold 12 and engage the fittings 15 of the capsule filter 13 with the respective fittings 14 of the manifold 12. For example, a mounting mechanism 16 may be arranged between the carriage 11 and the manifold 12 to move the capsule filter 13, e.g., longitudinally, between a disengaged position, as shown in Figures 1 and 2, and an engaged position, as shown in Figure 4. In the disengaged position, the capsule filter 13 may rest in the carriage 11 and may be spaced from the manifold 12. In the engaged position, the capsule filter 13 engages the manifold 12, and the fittings 14, 15 of the manifold 12 and the capsule filter 13 are sealed to one another.
With the fittings 14, 15 engaged, a pump 17, which may be fluidly coupled and even directly attached to the manifold 12, pumps fluid, e.g., a liquid such as a liquid photo resist, into an inlet conduit in the manifold 12, through the inlet fittings 14a, 15 a, and into the capsule filter 13. Gases, such as air contained in the capsule filter 13 or gas bubbles entrained in the liquid, may be vented from the capsule filter 13 via the vent fittings 14c, 15c and a vent conduit 20 of the manifold 12. Filtered liquid is forced by the pump through the filter medium of the capsule filter 13 and out of the capsule filter 13 via the outlet fittings 14b, 15b and an outlet conduit 21 of the manifold 12.
. Once the filter medium of the capsule filter 13 becomes sufficiently fouled, the pump 17 may be deactivated and the carriage 11 may be moved, e.g., lowered, by the mounting mechanism 16 to the disengaged position. A disengagement mechanism 22 may be coupled between the capsule filter 13 and the carriage 11 and/or the manifold 12 to disengage the fittings 15 of the filter capsule 13 from the fittings 14 of the manifold 12 as the carriage 11 is lowered. Alternatively, the capsule filter 13 may be disengaged from the manifold 12 manually. The old capsule filter 13 may then be replaced with a new capsule filter 13; the carriage 11 may be moved, e.g., raised, by the mounting mechanism 16 to the engaged position engaging the new capsule 13 with the manifold 12; and the pump 17 may then be reactivated.
The carriage 11 may be configured in a wide variety of ways. In may preferred embodiments, the carriage 11 may be arranged to move the capsule filter 13, both into and out of engagement with the manifold 12, in a direction parallel to the axes of the engaged fittings 14, 15. More preferably, the carriage 11 moves the capsule filter 13 in a direction parallel to the axes of the engaged fittings 14, 15 along most of, even more preferably, substantially all of, the distance that the capsule filter 13 travels on the carriage 11. In one example, shown in Figures 1 and 2, the carriage 11 may include a base assembly 23, a top assembly 24, and first and second preferably identical side assemblies 25 which extend between the top assembly 24 and the base assembly 23. The base, top, and side assemblies may each comprise any of a wide array of suitable structures, including multi-piece structures. However, in many preferred embodiments, the base assembly 23 comprises a base 26, such as a base plate, which supports the capsule filter 13 and on which the capsule filter 13 rests. Further, the side assemblies 25 each comprise side plates 30 which are connected to the base 26. The side plates 30 preferably extend parallel to each other closely along the exterior of the sides of the manifold 12 to the top assembly 24. The manifold 12 may include guide channels 29 within which the side plates 30 slide, e.g., upwardly and downwardly, as the carriage 11 moves between the disengaged and engaged positions. Alternatively, the manifold may include pins or rollers which engage slots or tracks on the side plates. In addition, the top assembly 24 may comprise a top plate 31 which is connected to the side plates 30 and extends along the top of the manifold 12. The carriage 11 thus surrounds the exterior of the manifold 12 and is preferably accessible for maintenance without having to disturb the manifold 12, e.g., dismantle the manifold 12 from the pump 17. As another example, the carriage may comprise a base assembly and opposite side assemblies without a top assembly. The carriage may then be operatively associated with the manifold in any suitable manner, for example, by connecting the side assemblies of the carriage to the sides or the bottom of the manifold via a mounting mechanism. As yet another example, the carriage may be operatively associated with a structure other than the manifold. For example, when the manifold is attached to a pump, the carriage may also be coupled to the pump, rather than the manifold, and arranged to move the capsule filter between engagement and disengagement with the manifold. In many preferred embodiments, the base plate and the side plates comprise a generally U-shaped assembly adapted to support the capsule filter, and the carriage thus comprises a compact, highly space efficient structure for supporting the capsule filter. For example, the carriage and the capsule filter may be installed in a space having a relatively small width, e.g., a width of about 60 millimeters or less, compared to a width of about 140 millimeters or more required for many conventional filter mounting mechanisms. The capsule filter 13 can thus be mounted and dismounted within a 60-millimeter- wide front area. Especially when combined with a 60 millimeter-wide pump, a filtration system embodying the present invention provides a dispensing system that has a high space utilization efficiency but is nonetheless easily accessible and therefore easy to use and maintain. In the disengaged position, the carriage preferably supports the filter capsule on the base assembly. The filtration system may also include a positioning mechanism which allows the capsule filter to be positioned and oriented on the base assembly with the fittings of the capsule filter at least roughly aligned with the fittings of the manifold. The positioning mechanism may be operatively associated with the carriage and/or the capsule filter and may take a variety of forms. In the embodiment of Figures 1-4, the positioning mechanism 32 is cooperatively arranged with the base 26 and may include a rear wall 33 which limits the rearward movement of the capsule filter 13. The rear wall may extend from the base assembly or from one or both of the side assemblies. Further, the positioning mechanism 32 may include an opening such as an elongated slot 34 which extends within the base 26 from the front edge and a corresponding elongated tab or protrusion 35 which extends from the bottom of the capsule filter 13. The slot 34 and the protrusion 35 may be dimensioned to limit the rearward movement of the capsule filter 13 on the base 26 and/or to angularly orient the capsule filter 13 on the base 26 with the fittings 15, 14 at least roughly aligned with one another. With the capsule filter 13 positioned on the base 26, the capsule filter 13 may slide rearwardly along the base 26 with the protrusion 35 sliding within the slot 34. The close proximity of the sides of the slot 34 and the sides of the protrusion 35 maintain the capsule filter 13 at a desired angular orientation with respect to the manifold 12. Once the backside of the capsule filter 13 contacts the rear wall 33 and/or the backside of the protrusion 35 contacts the backside of the slot 34, the axes of the fittings 14, 15 are at least roughly aligned axially. The capsule filter 13 may then be mounted to the manifold 12 without damaging the fittings 14, 15 due to misalignment. The positioning mechanism is not limited to the embodiment shown in
Figures 1-4. For example, as shown in Figures 5 and 6, the rear wall may be eliminated and the positioning mechanism may comprise openings such as one or more holes 36 in the base 26 and one or more corresponding protrusions 37 extending from the bottom of the capsule filter 13. The capsule filter 13 is positioned on the base 26 with the protrusions 37 of the capsule filter 13 disposed in the holes 36 of the base 26. The protrusions 37 and the holes 36 are dimensioned and located on the capsule filter 13 and the base 26, respectively, such that when the protrusions 37 are disposed in the holes 36, the fittings 14, 15 of the manifold 12 and the capsule filter 13 are at least roughly aligned axially. The embodiment shown in Figures 5 and 6 has two holes 36 and two protrusions 37. However, the positioning mechanism may comprise more than two holes and protrusions, e.g., three holes and protrusions spaced from one another in a triangular configuration, or only one hole and protrusion, e.g., an elongated hole 28 (and a corresponding protrusion) as shown in Figure 7. Further, while the positioning mechanisms of the illustrated embodiments have been associated with the base assembly, the positioning mechanism may be associated with the carriage in other ways, e.g., with the side assemblies.
Once the capsule filter 13 is positioned on the carriage 11, the carriage 11 is moved from the disengaged position toward the engaged position by the mounting mechanism. The mounting mechanism may also take a variety of forms, and one example of a mounting mechanism 16 is shown in Figures 1-4. The mounting mechanism 16 is preferably cooperatively arranged between the carriage 11 and the manifold 12 and in some embodiments may comprise a threaded arrangement including a threaded stud 40 and a mating nut 41, which may be part of a knob 42. The threaded stud 40 may have trapezoidal threads and is preferably fixedly mounted to the top of the manifold 12 extending toward the top assembly 24 of the carriage 11. The nut 41 is correspondingly threaded and is preferably rotatably mounted to the top assembly 24, e.g., the top plate 31, to receive the stud 41 in threaded engagement. As the knob 42 is rotated in one direction, the nut 41 moves axially in one direction along the stud 40, e.g., away from the manifold 12, and, in turn, moves the base 26 of the carriage 11 from the disengaged position toward the manifold 12 and the engaged position, where the fittings 15 of the capsule filter 13 engage the fittings 14 of the manifold 12. As the knob 42 is turned in the opposite direction, the nut 41 moves axially in the opposite direction along the stud 40 (e.g., toward the manifold 12) and, in turn, moves the base 26 of the carriage 11 back toward the disengaged position. The threads may be arranged to provide a quick release of the capsule filter 13 from the manifold 12. For example, the threads may be arranged such that turning the knob 42 in the range from about 90 degrees to about 360 degrees may be enough to release the capsule filter 13 from the manifold 12.
Alternatively, the mounting mechanism may comprise a threaded stud and a correspondingly threaded portion of the top assembly of the carriage, which receives the threaded stud. One end of the threaded stud may be part of a knob and the opposite end of the stud may bear against, or may be rotatably fixed to, the top of the manifold. This embodiment of the mounting mechanism operates in a manner similar to the mounting mechanism 16 shown in Figures 1-4.
Another example of a mounting mechanism 16 is shown in Figures 8- 13. (Components of the embodiment shown in Figures 8-13 have the same reference numbers as the analogous components of the embodiments shown in Figures 1-7.) The mounting mechanism 16 shown in Figures 8-13 is preferably cooperatively arranged between the carriage 11 and the manifold 12 and may comprise a pivotable lever arrangement including a lever 51 which is pivotable about a pivot axis 52. The lever may be coupled between the manifold and the carriage in a variety of ways. For example, the lever 51 may be pivotably mounted by pivot pins 53 to a bracket 54 which, in turn, may be mounted to the top of the manifold 12. Alternatively, the lever 51 may be mounted to brackets on the sides of the manifold. The lever 51 may also be mounted to the carriage 11 in a variety of ways, e.g., to the side assemblies 25. The lever 51 is preferably arranged to lift the carriage 11 from the disengaged position toward the engaged position as the lever 51 is lifted and to lower the carriage 11 from the engaged position toward the disengaged position as the lever 51 is lowered. The mounting mechanism 16 may also include a spring arrangement 55 for biasing the lever 51 toward a lifted and/or lowered position, maintaining the carriage 11 in the engaged and/or disengaged position.
Other examples of mounting mechanisms, e.g., mounting mechanisms comprising a cam arrangement, are shown in Figures 14-20. (Again, components of the embodiments shown in Figures 14-20 have the same reference numbers as the analogous components of the embodiments' shown in Figures 1-13.) For example, the mounting mechanism 16 shown in Figures 14 and 15 may comprise a removable or fixed lever 61 connected to a rotatable shaft 62 which, in turn, is rotatably connected to the manifold 12 by a mounting plate 63. The lever 61 extends through a cam slot 64 in a head 65 which may be fixedly attached to the top assembly 24 of the carriage 11, e.g., at the top plate 31. As the lever 61 is moved along the cam slot 64, the head 65 and hence the carriage 11 is raised or lowered between the disengaged position and the engaged position.
A similar mounting mechanism 16 is shown in Figures 16 and 17. The mounting mechanism 16 may include a pin 66 which extends radially from the rotatable shaft 62. The pin 66 is disposed in the cam slot 64 of the fixed head 65. The cam slot 64 may extend completely through the head 65, as in the embodiment shown in Figure 14, or it may merely extend partially into the inner periphery of the head 65. A structure 67 formed at the end of the shaft 62 may be engaged by a wrench, e.g., an alien wrench, to turn the shaft 62. Alternatively, the shaft may extend axially beyond the head and the protruding end of the shaft may be formed as a knob which may be turned manually. As the shaft 62 is turned, the pin 66 rides along the cam slot 64, and the head 65 and hence the carriage 11 is raised or lowered between the disengaged position and the engaged position. Another example of a mounting mechanism 16 which comprises a cam arrangement is shown in Figures 18-20. The mounting mechanism 16 may include a nonrotatable shaft 71 fixed to the manifold 12 and having a radially extending pin 72. The pin 72 is disposed in a cam slot 73 of a head 74 which is rotatably attached to the top assembly 24 of the carriage 11 by a mounting plate 75. Holes 76 in the head 75 receive a removable lever 77, e.g., a screwdriver, which can be used to rotate the head 74 on the shaft 71. Alternatively, the lever may be fixed to the head; the head may be formed with a structure that can be turned with a wrench; or the head may be formed as a knob that can be turned manually. As the head 75 is rotated, the pin 72 rides along the cam slot 73, and the head 74 and hence the carriage 11 is raised or lowered between the disengaged position and the engaged position.
As the carriage 11 is moved toward the manifold 12 from the disengaged position to the engaged position, the fittings 15 of the capsule filter 13 approach the fittings 14 of the manifold 12. The fittings 14, 15 may be at least roughly aligned by the positioning mechanism. However, to more closely align the fittings 14, 15, the filtration system 10 may include a centering mechanism which closely aligns the axes of the fittings 14, 15 as they engage one another. The centering mechanism may be configured in a wide variety of ways. For example, the centering mechanism 80 may comprise one or, preferably, a plurality of centering protrusions, e.g., centering pins 81, which fit into corresponding centering apertures 82 as the fittings 14, 15 engage each other. As shown in Figure 21, the centering pins 81 may extend upwardly from the capsule filter 13, e.g., the top of the capsule filter 13, and the corresponding centering apertures 82 may be disposed in the manifold 12, e.g., the bottom of the manifold 12. Alternatively, as shown in Figures 22 and 23, the centering pins 81 may extend from the bottom of the manifold 12 and the centering apertures 82 may be disposed in the top of the capsule filter 13.
The centering mechanism 80 is preferably located and dimensioned to ensure that the fittings 14, 15 are closely axially aligned as they sealingly contact one another! For example, the centering pins 81 and apertures 82 may have relatively close tolerances and may be arranged to closely engage one another before the fittings 14, 15 fully contact and are completely sealed to one another. With the centering pins 81 closely engaged with the centering apertures 82, the fittings 14 of the manifold 12 may be moved into full sealing contact with the fittings 15 of the capsule filter 13. The centering mechanism 80 thus prevents incomplete sealing and/or damage to the fittings 14, 15 due to misalignment. The centering mechanism 80 may also serve as a stop, limiting the advance of the fittings 14, 15 within each other and preventing over compression. Alternatively, stops may be provided elsewhere on the manifold and the capsule filter and/or the carriage.
As the carriage 11 is moved away from the manifold 12 from the engaged position to the disengaged position, the fittings 15 of the capsule filter 13 may be disengaged from the fittings 14 of the manifold 12. In some embodiments, the fittings 14, 15 of the manifold and the capsule filter 13 may remain engaged as the carriage 11 is moved to the disengaged position, the base assembly 23 of the carriage 11 moving away from the bottom of the capsule filter 13 as the carriage 11 moves to the disengaged position. The capsule filter 13 may then be removed from the manifold 12, e.g., by manually disengaging the fittings 15 of the capsule filter from the fittings 14 of the mamfold 12. Alternatively, the filtration system 10 may further comprise a disengagement mechanism which is operatively associated with the capsule filter 13 and automatically disengages the fittings 15 of the capsule filter 13 from the fittings 14 of the manifold 12 as the carriage 11 moves toward the disengaged position. The disengagement mechanism may be configured in a variety of ways. For example, the disengagement mechanism may be cooperatively arranged between the capsule filter 13 and the manifold 12. One example of such a disengagement mechanism 22 is shown in Figures 22 and 23 and comprises one or more springs 86 disposed between the capsule filter 13 and the manifold 12. The springs may be positioned in a variety of suitable locations between the capsule filter and the manifold. In the illustrated embodiment, a spring 86 is disposed around each centering pin 81. The springs 86 are compressed around the centering pins 81 as the carriage 11 is lifted to the engaged position by the mounting mechanism 16 and the fittings 15 of the capsule filter 13 are lifted into sealing contact with the fittings 14 of the mamfold 12. As the carriage 11 is lowered to the disengaged position by the mounting mechanism 16, the springs 86 expand and automatically disengage the fittings 14, 15. The centering mechanism 80 also helps to maintain axial alignment of the fittings 14, 15 as the fittings 14, 15 are disengaged by the disengagement mechanism 22. The capsule filter 13 remains on the base assembly 23 of the carriage 11 as the carriage 11 is moved to the disengaged position
In other embodiments, the'; disengagement mechanism may be cooperatively arranged between the capsule filter 13 and the carriage 11. One example of such a disengagement mechanism 22 is shown in Figures 1 and 4 and comprises one or more push rods 91 disposed between the carriage 11 and the capsule filter 13. The push rods may be positioned in a variety of suitable locations between the capsule filter and the carriage. In the illustrated embodiment, the push rods 91 are disposed in through holes 92 in the manifold 12 between the top of the capsule filter 13 and the top assembly 24 of the carriage 11. The push rods 91 may be lifted along with the capsule filter 13 and the carriage 11 as the carriage 11 is moved to the engaged position by the mounting mechanism 16. As the carriage 11 is lowered to the disengaged position by the mounting mechanism 16, the top assembly 24 of the carriage 11 may bear against the push rods 91. The push rods 91, in turn, bear against the top of the capsule filter 13, forcing the capsule filter 13 away from the manifold 12 and automatically disengaging the fittings 14, 15. The capsule filter 13 remains on the base assembly 23 of the carriage 11 as the carriage 11 is moved to the disengaged position.
Another example of a disengagement mechanism 22 cooperatively arranged between the carriage 11 and the capsule filter 13 is shown in Figures 24 and 25. (Components of the embodiment shown in Figures 24 and 25 have the same reference numbers as the analogous components of the embodiment shown in Figures 1-4.) The disengagement mechanism 22 generally comprises a. fitment which physically couples the capsule filter 13 and the carriage 11 as the carriage 11 moves between the engaged position and the disengaged position. The fitment niay be structured in a wide variety ofways. In the illustrated embodiment the fitment 96 comprises the engagement of the base assembly 23 of the carriage 11 with the capsule filter 13, e.g., with a flange 97 extending from the protrusion 35 in the bottom of the capsule filter 13 past the edges of the slot 34 in the base 26. As the carriage 11 is lowered to the disengaged position by the mounting mechanism 16, the base 26 of the carriage 11 bears against the flange 97 of the capsule filter 13, forcing the capsule filter 13 away from the manifold 12 and automatically disengaging the fitting 15 of the capsule filter 13 from the fittings 14 of the manifold 12. The capsule filter 13 remains on the base assembly 23 of the carriage as the carriage 11 is moved to the disengaged position. Another example of a fitment is a flange which extends from each side assembly of the carriage over the top of the capsule filter. As the carriage is lowered by the mounting mechanism, the flanges of the side assemblies may bear against the top of the capsule filter, automatically disengaging the capsule filter from the manifold.
The manifold 12 may also be configured in a wide variety ofways. For example, the manifold may have any regular or irregular shape. As shown in Figures 1-4, the manifold 12 may have a box-shaped configuration including a front 100, a back 101, a top 102, a bottom 103 and opposite sides 104, 105. The manifold 12 may further include one or more conduits for transporting fluid to and/or fromthe capsule filter. Each of the conduits is preferably configured to reduce hold up volume and to avoid dead volumes or zones where the fluid can stagnate.
In many preferred embodiments, the manifold 12 is fluidly coupled to a pump 17. For example, the manifold 12 may be directly attached to the pump 17, e.g., along the back 101 of the manifold 12. The outlet of the pump 17 may be connected to an inlet conduit of the manifold 12 which extends through the manifold 12 and fluidly communicates, in turn, with the inlet fittings 14a, 15a of the manifold 12 and the capsule filter 13. Alternatively, the inlet conduit may be at least partially external to the manifold, e.g., extending externally from the pump to the manifold and hence to the inlet fittings. The manifold 12 may also include an outlet conduit 21 which fluidly communicates between the outlet fittings 14b, 15b and any other appropriate component of the fluid system downstream of the manifold 12. In the illustrated embodiment, the outlet conduit 21 may extend from the outlet fittings 14b, 15b through the manifold 12 to the front 100 of the manifold 12. However, the outlet conduit may extend from any portion of the manifold, including the top of the manifold. The manifold 12 may further include a vent conduit 20 which fluidly communicates between the vent fittings 14c, 15c and any appropriate reservoir for the vented gas. Again in the illustrated embodiment, the vent conduit 20 may extend from the vent fittings 14c, 15c through the manifold 12 to the front 100 of the manifold 12. However, the vent conduit may extend from any portion of the manifold, including the top of the manifold. In some embodiments, the vent conduit, as well as the vent fittings, may be eliminated entirely. The number and configuration of the fittings 14 of the manifold 12, as well as the fittings 15 of the capsule filter 13, may be widely varied. In many embodiments the manifold 12 has three fittings 14a, 14b, 14c. However, a manifold may have more than three fittings or fewer than three fittings. For example, where a vent is not preferred or where the inlet to the capsule filter or the outlet from the capsule filter is not directed through the manifold, the manifold may have two fittings or only a single fitting.
The fittings 14 of the manifold 12, as well as the fittings 15 of the filter cartridge 13, may be structured in a variety of ays. For example, the fittings may be arranged in any regular or irregular pattern, such as a triangular pattern. Preferably, the fittings 14, 15 are generally aligned. Further, the spacing between the fittings, or the pattern of the fittings, may be symmetric but is preferably not symmetric. For example, as shown in Figure 2, the distance between the vent fittings 14c, 15c and the outlet fittings 14b, 15b may be less than the distance between the outlet fittings 14b, 15b and the inlet fittings 14a, 15a. A unsymmetric spacing or pattern helps to prevent the capsule filter from being installed "backwards" on the mamfold.
The fittings may be structured in various ways. For example, each of the fittings may comprise a nozzle or a port or receptacle which receives a nozzle. Some of the fittings on the manifold, or the capsule filter, may comprise nozzles while others comprise receptacles, or all of the fittings on the mamfold may comprise nozzles or receptacles. In the illustrated embodiment, the fittings 14a, 14tf, 14c of the manifold 12 all preferably comprise nozzles 110 and the fittings 15a, 15b, 15c of the capsule filter 13 all preferably comprise corresponding receptacles 111 which receive the nozzles 110 of the manifold 12. A wide assortment of nozzles and receptacles are suitable. However, the nozzle preferably includes a tip portion which contacts, and more preferably seals against, a corresponding surface in the receptacle. By contacting and or sealing the tip portion of each nozzle with a corresponding surface in the receptacle, gaps or leakage volumes at the ends of the nozzles are eliminated, reducing the hold up volume and minimizing stagnant flow areas or dead zones within the filtration system, and the filtration system may be made smaller. To enhance the sealing engagement of the tip portion of each nozzle and the corresponding contact surface of the receptacle, at least the tip portion of the nozzle and the contact surface of the receptacle are preferably formed from different materials, one harder and the other of similar hardness or, more preferably, somewhat softer or more deformable. As the tip portion of the nozzle engages the contact surface of the receptacle, the softer material deforms to the harder material, forming a highly effective seal. The sealing engagement of the contact surface of the tip portion of the nozzle and the contact surface of the receptacle is preferably free of any additional sealing member, such as a gasket, at the contacting surfaces and may comprise the only or the primary seal between the fittings. However, additional seals spaced from the contacting surfaces, such as a supplemental O-ring seal, may also be provided between the nozzle and the receptacle. The seal formed by the contact surfaces may, for example, prevent any dead zones or stagnant portions from developing at the ends of the nozzle, while the supplemental O- ring seal may ensure a liquid and/or air tight seal between the fittings. Either the tip portion of the nozzle or the contact surface of the receptacle may be formed from the harder material or the softer material. Because the capsule filter is preferably disposable and the manifold is preferably reusable, it is preferable to form the fitting on the manifold, e.g., either the nozzle or the receptacle on the manifold, from the harder material. Examples of harder materials include metal, such as stainless steel, and polymeric materials, such as polyethylene, e.g., HDPE, polypropylene, PFA, ETFE, ECTFE, and PCTFE (polychlorotrifmoroethylene), which may be relatively harder than the material in the corresponding fitting. Examples of softer materials include elasomeric-type materials, such as rubber, silicone, and polyurethane, and polymeric materials, such as LDPE, FEP, PFA and PTFE, which may be relatively softer than the material of the corresponding fitting. Generally, any suitable combination of relatively hard and relative soft materials may be used for the nozzle/receptacle arrangements based, for example, on a shore hardness D-scale, where PTFE is in the range from about 50 to about 56; ETFE is about 75; FEP is about 55; PFA is about 60; PCTFE is about 90; ECTFE is about 75; PVDF is in the range from about 70 to about 80; LDPE is in the range from about 40 to about 50; and HDPE and UHMWPE are in the range from about 60 to about 70.
The nozzles and receptacles may be structured in numerous ways. (Components of the embodiments shown in Figures 26-41 have the same reference numbers as the analogous components of the embodiments shown in Figures 1-25.) Some of the many examples of nozzle/receptacle arrangements are illustrated in Figures 26-41. In each of the illustrated embodiments, the nozzle is operatively associated with the manifold and the corresponding receptacle is operatively associated with the capsule filter. However, one or more of the nozzles may alternatively be associated with the capsule filter while the conesponding receptacle is associated with the manifold.
In the embodiment shown in Figures 26 and 27, the manifold 12 may comprise a body 115, e.g., a polymeric body, and may further comprise a bottom plate 116, e.g., a metal plate, mounted to the body 115. A nozzle 110, which is preferably unitarily formed with the body 115, extends through an aperture 118 in the bottom plate 116. A conduit 119, e.g., an inlet, outlet, or vent conduit, extends through the body 115 and the nozzle 110, opening in the tip portion 120 of the nozzle 110.''
The receptacle 111 of the capsule filter 13 may comprise a collar 126, e.g., a polymeric collar, which has a region defining a bore 127. A seat 128, which preferably comprises a separate insert, may be positioned within the bore 127 on a ledge 129 of the collar 126. The seat 128 may be formed from a material different from the material of the nozzle 110 and also different from the material of the collar 126, the seat 128 being preferably formed from a material which is softer or harder than the material of the nozzle 110 or the collar 126. For example, the seat 128 may be formed from PTFE while the nozzle 110 and the collar 126 may be formed from polyethylene, PFA or
PCTFE. A seal, such as an O-ring 130, may be positioned in the bore 127 on a rim of the seat 128 and around the interior of the collar 126. A cap 131 may be mounted to the collar 126 over the O-ring 130. The cap 131 has an opening 132 which is large enough to receive the nozzle 110. The opening 132 in the cap 131, as well as the collar 126, the seat 128, and/or the tip portion 120 of " the nozzle 110, and may be tapered to facilitate insertion of the nozzle 110 into the receptacle 111. A conduit 133 extends through the collar 126 and at least partially through the seat 128 and opens onto the opening 132 in the cap 131. The tip portion 120 of the nozzle 110 and the seat 128 each have a contact surface 140, 142 which may be similarly or differently shaped. The configuration of each contact surface 140, 142 may vary. For example, the contact surfaces 140, 142 of the tip portion 120 and the seat 128 may have curved or tapered configurations such as a spherical or conical configuration or a flat annular configuration. The area of the contact surfaces 140, 142 may be relatively wide but in many preferred embodiments, the area of at least one of the corresponding contact surfaces 140, 142 may be relatively narrow.
As the carriage moves from the disengaged position to the engaged position and the nozzle 110 is inserted into the receptacle 111, the O-ring 130 seals against the nozzle 110. The O-ring 130 may also seal again the rim of the seat 128, the inner wall of the collar 126 and/or the cap 131. In addition, the contact surfaces 140, 142 of the nozzle 110 and the receptacle 111 engage and at least the softer surface, e.g., the contact surface 142 of the seat 128, preferably deform to effectively seal against the harder surface, e.g., the contact surface 140 of the tip portion 120 of the nozzle 110. As the nozzle 110 bears against the seat 128, not only does the contact surface 142 of the seat 128 seal against the contact surface 140 of the nozzle 110, but the seat 128 also deforms and seals against the collar 128, e.g., against the ledge 129 and/or the inner wall of the bore 127 of the collar 126. By contacting and sealing the seat 128 against the tip portion 120 of the nozzle 110 and the collar 126 of the receptacle 111, no gaps or leakage volumes are created which can hold up fluid and cause dead zones or stagnant flow areas. Instead, the channel defined by the conduits 119, 133 extending through the nozzle 110 and the receptacle 111 provides a flow path free of hold up volumes, leakage volumes, and dead zones, as shown in Figure 27. In addition to reducing hold up volumes, leakage volumes and dead zones, the nozzle/receptacle arrangement provides a more reliable filtration system 10 and facilitates manufacture of the manifold 12 and the capsule filter 13. For example, the dimensional variations associated with the axial length of the nozzles 110, e.g., from the bottom plate 116 to the tip portion 120, may mean that nozzles 110 on the same manifold 12 have different lengths. This variation may be accommodated by the deformation of the seat 128. Longer nozzles 110 may deform the seat 128 slightly more than shorter nozzles 110 while both adequately seal the fittings.
In addition, eccentricities in the alignment and/or spacing of the nozzles 110 on the same manifold 12 may be accommodated by the deformation of the seat 128 and the use of an insert for the seat 128, or the nozzle 110. The seat 128 and/or the nozzle 110 may be arranged to move laterally as the fittings 14, 15, including the contact surfaces 140, 142, contact one another. For example, the outer diameter of the seat 128 may be slightly smaller than the diameter of the bore 127 in the collar 126, e.g., by about 0.2 mm. As the fittings 14, 15, including the mating tapered contact surfaces 140, 142, engage one another, they laterally adjust the position of the seat 128 within the bore 127, centering the seat 128 on the nozzle 110. Further, any slight tilt of the axis of the nozzle 110 may be accommodated by an asymmetrical deformation of the seat 128 about the axis of the nozzle 110. Similar variations and eccentricities in the receptacle may also be accommodated. By accommodating these variations and eccentricities, abnormal stresses and strains on the nozzles and receptacles may be relieved, providing a more reliable filtration system. Further, neither the mamfold nor the capsule filter need be manufactured to extremely tight tolerances, reducing the cost of manufacture.
Other examples of the nozzle/receptacle arrangements are shown in Figures 28-41 and may provide similar and/or additional features and advantages. (Components of the embodiments shown in Figures 28-41 have the same reference numbers as the analogous components of the embodiment shown in Figures 26 and 27.) The embodiment shown in Figures 28 and 29 is very similar to the embodiment shown in Figures 26 and 27. However, ridges 145 may extend from the ledge 129 of the collar 126 toward the seat 128. The engagement of the contacting surfaces 140, 142 of the nozzle 110 and the receptacle 111 deforms the ridges 145 and/or drives the ridges 145 into the seat 128 to better seal the seat 128 to the collar 126. Alternatively, the ridges may extend from the seat toward the ledge of the collar and may deform and/or be driven into and seal against the ledge as the nozzle engages the receptacle. In the embodiment shown in Figures 30 and 31, the seat 128 may comprise a unitary portion of the collar 126 rather than an insert. However, the nozzle 110 preferably comprises an insert sealed to the body 115 of the mamfold 12, e.g., by an O-ring 146 disposed in a bore 147 at the upper end of the nozzle insert. The nozzle 110 may be formed from a different material, e.g., a harder material, than the collar 126 of the receptacle 111 and/or from a different material than the body 115 of the manifold 12. Variations and eccentricities may be accommodated by movement of the insert and by deformation of one or both contacting surfaces, in a manner similar to that previously described. In addition, variation in the length of the nozzles 110 may be accommodated by axial compression of the O-ring 146. The contact surfaces 140, 142 are preferably semi-spherical and may have a relatively broad contact area.
The embodiment shown in Figures 32 and 33 is similar to the embodiment shown in Figures 30 and 31. However, both the nozzle 110 and the seat 128 may comprise inserts. The O-ring 146 sealing the nozzle insert is disposed in a groove 147 around the outer periphery of the insert. Further, ridges 149 may be disposed between the nozzle insert and the body 115 of the manifold 12, in addition to the ridges 145 between the seat insert and the ledge
129 of the collar 126. The ridges 149 may extend from the body toward the nozzle insert or from the nozzle insert toward the body. The engagement of the contacting surfaces 140, 141 deforms the ridges 145, 149 and/or drives the ridges 145, 149 into the inserts to better seal the seat and nozzle inserts.
The embodiment shown in Figures 34 and 35 is similar to the embodiment shown in Figures 30 and 31. However, the receptacle 111 may not include a cap. Rather, the collar 126 may have a rim 150 which faces the manifold 12 and defines the opening 132 in the receptacle 111. The O-ring
130 which seals against the nozzle 110 is disposed in a groove 151 in the inner wall of the collar 126 which defines the bore 127. In addition, the contact surfaces 140, 142 preferably have a conical configuration and at least one of the contact surfaces 140, 142, e.g., the contact surface 142 of the seat 128, may have a relatively narrow contact area, which may enhance the seal between the contact surfaces 140, 142.
. The embodiment shown in Figures 36 and 37 is similar to both the embodiment shown in Figures 34 and 35 and the embodiment shown in Figures 32 and 33. The contact surface 142 of the seat insert has the relatively narrow contact area.
The embodiment shown in Figure 38 may comprise a nozzle 110, e.g., a nozzle insert, which has a groove 155 in the outer wall. An O-ring 156 is disposed in the groove 155 and provides a seal against the receptacle collar 125 which supplements the sealing engagement of the contact surfaces 140,
142. The embodiment shown in Figure 39 is similar to the embodiment shown in Figure 38. However, the receptacle 111 may include a cap 131 and a seat insert 128 comprising a spherical contact surface having a relatively narrow contact area. The embodiment shown in Figure 40 is similar to the embodiment shown in Figure 39. However, the tip portion 120 of the nozzle 110 may have a cylindrical configuration and both contact surfaces 140, 142 may have flat, annular configurations with relatively small contact areas.
The embodiment shown in Figure 41 is similar to the embodiment shown in Figure 40. However, the contact surfaces 140, 142 may have a reverse conical configuration in which the cone converges toward the axis of the nozzle 110 within the nozzle 110.
The fittings shown in Figures 26-41 include a nozzle and a corresponding receptacle having mating contact surfaces which preferably serve as a seal, e.g.," a primary seal or even the sole seal, between the fittings. However, other fittings between the manifold and the capsule filter may be used. For example, fittings which are threaded, clamped and/or friction fitted to one another may be used to seal the manifold to the capsule filter.
The filters may also be configured in a variety ofways, including, for example, as a capsule filter. One example of a capsule filter 13 is shown in Figures 42-46. The capsule filter 13 generally comprises a housing 160 and a filter cartridge 161 removably or, preferably, permanently disposed in the housing 160.
The housing 160 may be formed from any suitably impervious material, e.g., a metal or a polymeric material, and may have any desired shape, e.g., a generally cylindrical shape. In many preferred embodiments, the shape of the housing corresponds' o the shape of the filter cartridge.
The housing 160 may comprise a single piece structure but preferably comprises a multi-piece structure. For example, the housing 160 may include a bowl 162 and a head 163 removably or, preferably, permanently attached to the bowl 162. The bowl 162 may include a side wall and a bottom wall. A handle 159 may extend outwardly from the side wall of the bowl 162 and may be used to position the capsule filter 13 on the base assembly of the carriage with the protrusion 35 on the bottom of the capsule filter 13 engaged in the slot in the base. The housing 160 has one or more fittings, e.g., an inlet fitting 15a, an outlet fitting 15b, and a vent fitting 15c. The inlet fitting 15a and the outlet fitting 15b define a fluid flow path through the housing 160. The fittings may be variously configured, e.g., as nozzles. In the embodiment illustrated in Figures 42-45, the fittings each comprise receptacles which may be similar to any of the receptacles previously described. One or more of the fittings may be disposed in the bowl, e.g., at the bottom or in the side wall of the bowl. Preferably, however, at least one and, more preferably, all of the fittings 15a, 15b, 15c are disposed in the head 163 on the top of the capsule filter 13.
The housing 160 preferably contains the filter cartridge 161 within a filter cartridge chamber in the fluid flow path. The filter cartridge preferably includes a filter element 170 having a filter medium, as shown in Figure 46. The filter medium may comprise a solid or hollow porous mass, such as a cylindrical mass of sintered metal particles or a cylindrical mass of bonded and or intertwined fibers, e.g., polymeric fibers. In many preferred embodiments, the filter medium may comprise a permeable sheet, e.g., a porous woven or non- woven sheet of fibers, including filaments, or a permeable or porous, supported or unsupported polymeric membrane, and the filter element 170 may have a cylindrical, hollow pleated configuration. The filter medium may be the sole layer of the pleated filter element 170 but is preferably one of two or more layers of a pleated composite further including, for example, one or more drainage layers, pre-filter layers, additional filter layers, substrates, and/or cushioning layers. The pleats of the filter element may extend radially or, preferably, non-radially, as disclosed, for example, in USP 5,543,047 which is incorporated by reference. As disclosed in USP 5,543,047 non-radially extending pleats each have a height greater than (D- d)/2 and less than or equal to (D2-d2)/[4(d + 2t)] where D and d are the outside and inside diameters, respectively, of the pleated filter element at the crests and roots of the pleat and t is the thickness of a pleat leg. Preferably, the height of each pleat is in the range from about 70% or 80% to about 100% of (D2-d2)/[4(d + 2t)]. The non-radial pleats may be preferred because there may be little or no space between the pleats, minimizing hold up volume and dead zones.
The hollow filter element 170 is preferably disposed between a cage 171 and a core 172. The ends of the filter element 170, the cage 171 and the core 172 may be sealed to end caps 173, 174, e.g., a blind end cap 173 and an open end cap 174. The open end cap 174 has an opening 175 which fluidly communicates with the interior of the hollow filter element 170. The open end cap may be sealed or attached to the housing with the opening in the open end cap, in turn, fluidly communicating with a fitting. For example, in the embodiment shown in Figures 42-45, the open end cap 174 may be bonded to the head 163 with the outlet fitting 15b preferably fluidly communicating with the interior of the filter element 170 via the opening 175 in the open end cap 174. The inlet fitting 15a preferably fluidly communicates with the exterior of the filter cartridge 161. Flow may then be directed outside in through the filter cartridge 161. Alternatively, the inlet fitting and the outlet fitting may be arranged to fluidly communicate with the interior and the exterior, respectively, of the filter cartridge, and flow may be directed inside out through the filter cartridge.
. While the filter cartridge has been described in terms of a hollow filter element 170 having a pleated filter medium, a cage 171, a core 172 and end caps 173, 174, the filter cartridge is not limited to this embodiment.
Numerous alternative filter cartridges are suitable. For example, the filter element may have a filter composite which is spirally wound rather than pleated. The cage and/or the core may be eliminated. Further, one or both end caps may be eliminated, and the ends of the filter element may be bonded directly to the top and/or bottom of the housing. Yet other examples of filter cartridges may incorporate filter media comprising permeable hollow fiber media. For example, as shown in Figure 47, a capsule filter 13 may comprise a filter cartridge 161 which may include permeable, e.g., porous, hollow fibers 180. (Components of the embodiment shown in Figure 47 have the same reference numbers as the analogous components of the embodiment shown in Figure 45.) The hollow fibers 180 may be contained between end caps 181, 182, e.g., an open end cap 181 and a blind end cap 182. In particular, the hollow fibers 180 may be potted in and extend from a partition 183 of the open end cap 181 and loop back to the partition 183, one or both of the ends of the hollow fibers 180 being an open end fluidly communicating with the opening 184 in the open end cap 181. A perforated cage 185 may extend between the end caps 181, 182 around the hollow fibers 180. Alternatively, both end caps may be open end caps and the cage may have no openings, the fluid being directed into the filter cartridge through the open lower end cap, or the cage and the blind end cap may be eliminated.
Another example of a capsule filter 13 comprising permeable hollow fibers 180 is shown in Figure 48. (Components of the embodiment shown in Figure 48 have the same reference numbers as the analogous components of the embodiment shown in Figure 47.) In the embodiment shown in Figure 48, the hollow fibers 180 extend between the partition 183 in the open end cap 181 and the blind end cap 182. One end of each hollow fiber 180 may be blindly potted in the blind end cap 182, while the other end is openly potted in the partition 183 in fluid communication with the opening 184 in the open end cap 181. A perforated cage may or may not extend between the end caps.
Regardless of the configuration of the filter cartridge, the interior of the housing is preferably fitted to the'filter cartridge to minimize hold up volume and dead zones and to enhance fluid flow distribution and rise time within the housing. For example, as shown in Figure 45, the interior side wall of the bowl 160 and the exterior of the filter cartridge 161 may be similarly shaped, and the bowl 160 preferably fits closely completely around the filter cartridge 161, defining an annular fluid flow distribution channel between the interior of the bowl 160 and the exterior of the filter cartridge 161. The annular channel is preferably dimensioned to reduce hold up volume and to allow a sweep of fluid flow around and/or axially along the filter cartridge without undue pressure drop between the inlet and outlet fittings. The desired dimensions of the annular channel may be determined empirically based on such factors as, for example, the viscosity of the fluid, the desired flow rates and pressure drop limits and the area of the inlet or outlet, e.g., the inlet fitting or the outlet fitting. For many embodiments, the axial cross sectional area of the annular channel may preferably be on the order of, e.g., approximately equal to, the ' area of the inlet nozzle.
Further, the interior bottom wall of the bowl 160 and the bottom of the filter cartridge 161 may also be similarly shaped and closely fitted to one another. The bottom of the filter cartridge may completely contact and may be attached to the bottom wall of the bowl, eliminating any space between them. However, in many preferred embodiments, the bottom of the filter cartridge is fitted to the bottom of the housing with one or more lower flow channels extending between them and communicating with the bottom of the annular flow channel. For example, the bottom of the filter cartridge, e.g., the bottom of the lower end cap, and/or the interior bottom wall of the housing may have one or more radially extending ribs or spokes. The filter cartridge and the housing may contact one another along the ribs and define the lower channels between them. Further, the interior bottom wall of the housing and or the bottom of the filter cartridge preferably have a surface which is inclined upward to decrease the rise time ofbubbles from the bottom of the filter. For example, the lower flow channels may incline upwardly toward the annular channel, preferably at an angle ofabout 15° or less, e.g., about 10° or less. The lower channels are preferably dimensioned to reduce hold up volume, to allow a sweep of fluid flow between the filter cartridge and the bottom of the housing without undue pressure drop between the inlet and outlet fittings, and/or to facilitate clearance ofbubbles from the bottom of the filter. Again, the desired dimensions of the lower channels, including the degree of incline, may be determined empirically based factors such as fluid viscosity, desired flow rates, pressure drop limits and inlet/outlet areas.
The interior wall of the head 163 may fit closely to the top of the filter cartridge away from the vent fitting 15c but is preferably at least slightly spaced from the top of the filter cartridge 161 in the vicinity of the vent fitting 15c, allowing gases to rise from the annular flow distribution chamber and over the top of the filter cartridge 161 toward the vent fitting 15c. Preferably, the space between the interior wall of the head 163 and the top of the filter cartridge 161, e.g., the top of the upper end cap, increases continuously from a location most distant from the vent fitting 15c to the vent fitting 15c. Nonetheless, while the space between the interior wall of the head 163 and the top of the filter cartridge 161 is preferably sufficient to vent gas from the capsule filter 13, it is also preferably small enough to avoid excessive hold up volume.
In many, but not all, preferred embodiments, the housing may comprise a fluid conduit, e.g., a fluid inlet conduit or a fluid outlet conduit, which extends from one of the fittings axially along the periphery of the filter cartridge chamber and is isolated from the filter cartridge chamber along a substantial length of the conduit, e.g., at least about 50 percent of the length of the conduit. For example, the fluid conduit may be disposed in the bowl, or adjacent to the bowl, and radially beyond the filter cartridge chamber. Preferably, the fluid conduit extends from a fitting at the top of the housing and opens into the filter cartridge chamber, e.g., the annular flow distribution channel, at the bottom of the housing. As shown in Figure 45, the fluid conduit 164 may comprise an inlet conduit extending axially along the periphery of the filter cartridge chamber from the inlet fitting 15a at the top of the housing 160 through the head 163 and the bowl 162 to the bottom of the housing 160. The inlet conduit 164 preferably communicates with the annular fluid flow distribution channel and the filter cartridge chamber only at the bottom of the housing 160 and, therefore, is isolated from the filter cartridge chamber for at least about 70 percent, more preferably at least about 80 percent or at least about 90 percent, of the length of the conduit 164.
The housing may also preferably comprise a radial passage through the side wall and/or more preferably in the interior bottom wall of the housing which extends from the side wall of the bowl 162, and fluidly communicates with the axial fluid conduit. The radial passage may extend along the lower end cap or along the bottom wall of the housing or along both, e.g., between the lower end cap and the bottom wall. For example, the radial passage may extend from the bottom of the fluid conduit, under the filter cartridge, e.g., under the lower end cap. The radial passage may extend completely under the filter cartridge but preferably extends only part way under the filter cartridge. As shown in Figure 45, the radial passage 165 extends from the bottom of the fluid conduit 164 under the filter cartridge 161, terminating near the center of the filter cartridge chamber of the housing 160. The radial passage 165 may have a uniform cross section or a tapered cross section, e.g., the cross section may decrease with increasing distance from the side wall of the bowl 162. The radial passage 165 may feed fluid to, or receive fluid from, the lower flow channels between the bottom of the filter cartridge 161 and the bottom wall of the bowl 162 and may fluidly communicate between the lower flow channels and the axial fluid conduit. Alternatively, the radial passage may be eliminated, e.g., where there are no longer flow channels between the bottom of the filter cartridge and the bottom wall of the bowl.
Further, in many preferred embodiments the filter cartridge may comprise a keying mechanism cooperatively arranged between the housing and the filter cartridge to center the filter cartridge in the filter cartridge chamber of the housing and provide a uniform annular flow channel. The keying mechanism may have any "of numerous suitable structures. For example, the keying mechanism may comprise one or more centering pins and mating centering apertures on the housing and the filter cartridge similar to the centering mechanism 80 previously described. More preferably, one or both of the end caps, e.g., the lower end cap and the corresponding wall of the housing may have mating profiles or shapes which center the filter cartridge in the filter cartridge chamber as the filter cartridge is mounted within the housing. The shapes may, for example, comprise curved or tapered configurations, e.g., a partially spherical, elliptical or conical configuration, on one or both end caps and the corresponding wall of the housing. As shown in Figure 45, the lower end cap 173 may have a generally conical configuration which mates with a conical configuration in the interior bottom wall of the bowl 162 of the housing 160. The configurations are located and shaped to center the filter cartridge 161 in the filter cartridge chamber. Thus, as the filter cartridge 161 is mounted within the bowl 162 with the configuration of the lower end cap 173 contacting the configuration of the interior bottom wall of the bowl 162, the filter cartridge 161 automatically centers itself within the filter cartridge chamber of the bowl 162 due to the mating engagement of the conical configurations. The head 163 may then be attached to the bowl 162 and the upper end cap 174 of the filter cartridge 161. A keying mechanism, such as mating configuration, e.g., conical configuration, in the interior wall of the head 163, e.g., the region of the head 163 near the outlet fitting 15b, and on the upper end cap 174, may center the filter cartridge 161 on the head 163 as well as the bowl 162.
The housing including one or more of the axial fluid conduit, the radial passage, and/or the keying mechanism may be fabricated in any suitable manner. For example, a molded bowl 162 is illustrated Figures 49 and 50. The bowl 162 may be molded in two pieces, e.g., a side wall piece 195 and a bottom wall piece 196, and the two pieces 195, 196 may be attached, e.g., welded or bonded, to form the bowl 162. In the illustrated embodiment, the bowl 162 includes an axial fluid conduit 164, a radial passage 165, a filter cartridge chamber, and a centering configuration 191 in the interior bottom wall of the bowl 162. Alternatively or additionally, the housing may be machined. For example, a machined bowl 162 is illustrated in Figures 51 and 52. The machined bowl 162 preferably comprises a unitary piece 197. A filter cartridge chamber and an axial fluid conduit 164 may be bored in the unitary piece 197. A radial passage 165 may be bored through the side wall of the unitary piece 197, and the exterior end of the radial passage 165 may be plugged or fitted with a fitting.
Capsule filters having one or more of the axial fluid conduit, the radial passage, and/or the keying mechanism have many advantages and represent a significant advance in the art. These features are even more valuable when combined with the close fit between the housing and the filter cartridge and the non-radial pleats of the filter cartridge. For example, the axial fluid conduit allows the fluid to sweep evenly along the axial length of the filter cartridge from the bottom to the top of vice versa, reducing or eliminating dead zones at the bottom or top of the annular channel. The radial passage coupled to the lower channels under the lower end cap further enhances the even distribution of fluid flow in the annular fluid channel around the filter cartridge and further avoids dead zones at the bottom of the annular channel. The keying mechanism ensures that the filter cartridge is centered in the filter cartridge chamber and provides a uniform annular channel, even further enhancing the even distribution of fluid flow around the filter cartridge. These advantages combined with the low hold up volume provided by the close fit between the housing and the filter cartridge and by the non-radial pleats of the filter cartridge provide a filter with far superior performance than conventional filters, with respect to reducing hold up volume and dead zones, providing an even distribution of fluid flow upward, or downward, along the filter cartridge; sharpening rise time; and minimizing the time to output of a fluid which has a desired level of cleanliness and is substantially free of gas bubbles. The present invention has been described in terms of several embodiments. However, the invention is not limited to these embodiments. For example, one or more of the features of one embodiment may be eliminated or combined with one or more of the features of another embodiment without departing from the scope of the invention. Further, entirely different embodiments may be envisioned, particularly in light of the foregoing teachings. Accordingly, the invention includes all variations and modifications encompassed with the scope of the attached claims.

Claims

Claims:
1. A filtration system comprising: a manifold having at least one fitting; a filter having at least one fitting; a carriage supporting the filter; and . a mounting mechanism operatively associated with the carriage to move the carriage between a first position wherein the filter is spaced from the manifold and a second position wherein the fitting of the filter engages the fitting of the manifold.
2. A filtration system of claim 1 wherein the carriage has a width of about 60 mm or less.
3. The filtration system of claim 1 or 2 further comprising a positioning mechanism operatively associated with at least one of the carriage and the capsule filter.
4. The filtration of claim 3 wherein the positioning mechanism comprises a protrusion on one of the filter cartridge and the carriage and a mating slot in the other of the filter cartridge and the carriage.
5. The filtration system of any preceding claim wherein the mounting mechanism comprises a threaded knob.
6. The filtration system of any preceding claim further comprising a disengagement mechanism operatively associated with the capsule filter.
7. The filtration system of claim 6 wherein the disengagement mechanism comprises push rods arranged between the capsule filter and the carriage.
8. A fitting arrangement comprising: a manifold having a first and a filter having a second fitting, wherein one of the first and second fittings comprises a nozzle having a tip portion which includes a contact surface and the other of the first and second fittings comprises a receptacle having a contact surface, the first and second fittings being engagable with the contact surface of the first fitting sealing against the contact surface of the second fitting.
9. The fitting arrangement of claim 8 wherein the contact surfaces have mating conical configurations.
10. The fitting arrangement of claim 8 or 9 wherein the contact surface of the nozzle and the contact surface of the receptable are formed from different materials, one material being harder than the other material.
11. The fitting arrangement of claim 8, 9 or 10 wherein at least one of the contact surface of the nozzle and the contact surface of the receptable is laterally adjustable.
PCT/US2001/015369 2000-05-12 2001-05-14 Filtration systems and fitting arrangements for filtration systems WO2001095993A2 (en)

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KR1020027015198A KR100850340B1 (en) 2000-05-12 2001-05-14 Filtration systems and fitting arrangements for filtration systems
DE60117260T DE60117260T2 (en) 2000-05-12 2001-05-14 FILTRATION SYSTEMS
EP01939021A EP1286746B1 (en) 2000-05-12 2001-05-14 Filtration systems
JP2002510166A JP4649092B2 (en) 2000-05-12 2001-05-14 Filtration device and connecting structure for filtration device
US10/275,862 US7338599B2 (en) 2000-05-12 2001-05-14 Filtration systems and fitting arrangements for filtration systems
US12/018,548 US7807055B2 (en) 2000-05-12 2008-01-23 Filtration systems
US12/885,601 US8293104B2 (en) 2000-05-12 2010-09-20 Filtration systems and fitting arrangements for filtration systems

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1479428A3 (en) * 2003-05-23 2005-03-09 SGT Singapore Holdings Pte Ltd. c.i.p.o.f. Quick-change filter system and a base and a quick-change filter intended for such a system
US6982041B2 (en) 2000-09-13 2006-01-03 Mykrolis Corporation Liquid filtration device
US7767083B2 (en) 2004-04-15 2010-08-03 Pall Corporation Fluid treatment arrangements and methods for operating fluid treatment arrangements
US8097157B2 (en) 2005-07-20 2012-01-17 3M Innovative Properties Company Fluid filtration system
US8709246B2 (en) 2008-09-16 2014-04-29 3M Innovative Properties Company Filter cartridge and system using linear actuation

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1775003B1 (en) * 2000-05-12 2009-12-23 Pall Corporation Filtration systems
EP2263771B1 (en) * 2004-04-05 2013-03-20 3M Innovative Properties Co. Filter cartridge
US8753097B2 (en) * 2005-11-21 2014-06-17 Entegris, Inc. Method and system for high viscosity pump
US7651070B2 (en) * 2006-01-19 2010-01-26 Clean & Clear Corporation Canter element controlled combination manifold, valve and filter module system
DE102006044744C5 (en) * 2006-09-20 2021-04-01 Aquis Wasser-Luftsysteme GmbH Lindau, Zweigniederlassung Rebstein Water filter device with encryption structure
DE202007002786U1 (en) * 2007-02-22 2008-06-26 Mann+Hummel Gmbh Fluid filter with a filter element which can be inserted into a filter housing
US8424920B2 (en) * 2008-03-07 2013-04-23 The Gates Corporation Multi-port fluid connectors, systems and methods
US11175279B2 (en) 2010-05-03 2021-11-16 Creatv Microtech, Inc. Polymer microfilters, devices comprising the same, methods of manufacturing the same, and uses thereof
US9682335B2 (en) 2011-02-24 2017-06-20 Saint-Gobain Performance Plastics Corporation Modular filter capsule apparatus
US8922092B2 (en) 2011-03-07 2014-12-30 Cutsforth, Inc. Brush holder assembly with quick disconnect terminal
AU2012340576A1 (en) 2011-11-21 2015-04-30 Creatv Microtech, Inc. Polymer microfiltration devices, methods of manufacturing the same and the uses of the microfiltration devices
WO2014055451A2 (en) * 2012-10-01 2014-04-10 Entegris, Inc. Purifier cassette
GB2506650A (en) * 2012-10-05 2014-04-09 Wli Trading Ltd Filter apparatus with lever operated cam mechanism
CN103786048B (en) * 2012-10-29 2016-06-29 富泰华工业(深圳)有限公司 Fast compressing device
EP3013446B1 (en) 2013-06-26 2021-12-08 Pentair Residential Filtration, LLC Filter cartridge and water filtration system
US9527021B2 (en) 2013-10-31 2016-12-27 Pall Corporation Filter manifold
US9757670B2 (en) * 2013-10-31 2017-09-12 Pall Corporation Methods for moving a filter along a manifold assembly; filter arrangements including a filter and a manifold assembly; and filters
US9492770B2 (en) 2013-10-31 2016-11-15 Pall Corporation Filters
US9713782B2 (en) 2013-11-11 2017-07-25 Pall Corporation Filters and filter arrangements which include a filter and a manifold assembly
USD755344S1 (en) 2014-06-26 2016-05-03 Pentair Residential Filtration, Llc Filter cartridge
KR101905023B1 (en) * 2016-07-07 2018-10-08 주식회사 퓨어엔비텍 Ceramic membranes module
US11338227B2 (en) * 2019-08-01 2022-05-24 Pall Corporation Manifold assembly and method of use
US10987615B2 (en) * 2019-09-17 2021-04-27 Pall Corporation Manifold assembly and method of use
US11045752B2 (en) * 2019-10-18 2021-06-29 Pall Corporation Manifold assembly and method of use

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257888A (en) * 1979-05-01 1981-03-24 Kudryavtsev Boris B Cartridge filter
US4719012A (en) * 1986-05-30 1988-01-12 Caterpillar Inc. Twist on disposable filter
US4743365A (en) * 1985-08-26 1988-05-10 Noland Wayne B Valve filter mechanism
US4904382A (en) * 1987-11-23 1990-02-27 Everpure, Inc. Filter cartridge security for locking between operating and non-operating positions
US5022986A (en) * 1990-01-11 1991-06-11 John Lang Manifold and disposable filter assembly
EP0640369A1 (en) * 1993-08-09 1995-03-01 Robert Bosch Gmbh Liquid filter
US5611922A (en) * 1993-08-16 1997-03-18 Donaldson Company Filter cartridge retention system
US5762787A (en) * 1995-01-13 1998-06-09 Ziba Design, Inc. Fluid filtration system having a readily detachable cartridge filter

Family Cites Families (196)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US420209A (en) 1890-01-28 Pipe-coupling for railway-cars
US136631A (en) 1873-03-11 Improvement in steam-power-brake couplings
US1791046A (en) * 1931-02-03 I-imeb and heans fob stjppobtina sake
US468390A (en) 1892-02-09 Low-water alarm
US898214A (en) 1903-11-27 1908-09-08 Edward E Gold Automatic pipe-coupling for railway-cars.
US872174A (en) 1907-03-25 1907-11-26 Ralph M Fyock Automatic train-pipe coupling.
US891718A (en) 1907-06-21 1908-06-23 Thomas B Mcmillan Coupling.
US872707A (en) 1907-06-29 1907-12-03 Peter Beahm Automatic connector for train-pipes.
US940334A (en) 1909-01-11 1909-11-16 William D Leftwich Coupling mechanism.
US967516A (en) 1909-09-01 1910-08-16 Henry Cain J Automatic air-coupling.
US991725A (en) * 1909-09-02 1911-05-09 Nat Carbonated Liquid Co Tap for dispensing liquid under pressure.
US1070110A (en) 1912-04-27 1913-08-12 James A Tate Automatic air-brake coupling or connector.
US1186068A (en) 1915-10-30 1916-06-06 Warren C Benjamin Air-brake coupling.
US1221682A (en) 1916-04-20 1917-04-03 William C Coffield Air-coupling.
US1389012A (en) 1920-07-10 1921-08-30 John W Roberts Pipe-coupling for railway rolling-stock
US1574336A (en) * 1922-07-22 1926-02-23 Harold L Blydenburgh Sediment trap
US1786066A (en) 1928-09-12 1930-12-23 Cobb Connector Company Train-pipe coupler
US1886398A (en) 1931-08-13 1932-11-08 Arthur C Harrell Automatic train pipe coupling
US2059358A (en) 1934-06-23 1936-11-03 Johnson Clarence Edward Oil clarifier
US2053892A (en) * 1935-07-22 1936-09-08 Charles W Beck Fountain pen and the ink supply therefor
US2197471A (en) 1937-05-13 1940-04-16 Wm E Hooper & Sons Company Oil filter cartridge and casing
US2345859A (en) 1940-08-02 1944-04-04 Phelps Dodge Corp Air scrubber
US2342948A (en) * 1942-03-02 1944-02-29 Long James Hartzell Oil filter
US2407190A (en) * 1944-06-30 1946-09-03 Sperry Gyroscope Co Inc Filter for fluid flow systems
US2462488A (en) 1945-06-07 1949-02-22 Fram Corp Control plate for filter cartridges
US2572981A (en) 1946-06-10 1951-10-30 Southwick W Briggs Support for filter elements
US2510125A (en) 1946-07-30 1950-06-06 Lawrence W Meakin Connector for fluid or electrical lines or both
US2462154A (en) 1946-12-10 1949-02-22 John V Barnes Water softener
US2630919A (en) * 1950-01-05 1953-03-10 James E Tyler Oil filter appliance
US2687905A (en) 1952-07-26 1954-08-31 Pacific Pipe Company Pipe coupling with cam disengageable pivoted detent means therefor
US2821411A (en) 1955-03-16 1958-01-28 Exactor Ltd Pipe couplings
US2997180A (en) 1957-06-03 1961-08-22 Chrysler Corp Anti-vapor-lock fuel filter
US3107601A (en) 1958-09-02 1963-10-22 Richard L Longmire Filtration and recirculation system for deep fat cooking apparatus
US3087849A (en) 1959-08-04 1963-04-30 Acf Ind Inc Fluid filtering device
US3067880A (en) 1959-09-30 1962-12-11 Gen Motors Corp Oil filter assemblies
US3104223A (en) * 1959-12-12 1963-09-17 Nissan Chemical Ind Ltd Vacuum-airtight arrangement for endless belt filter
US3052863A (en) 1961-03-16 1962-09-04 Ibm Contact connector operating devices
US3225929A (en) 1961-10-11 1965-12-28 American Mach & Foundry Closure means for filter containing pressure vessels
US3214195A (en) 1962-05-25 1965-10-26 Crawford Fitting Co Coupling device for interconnecting multiple fluid lines
US3145173A (en) * 1962-11-26 1964-08-18 Pennsalt Chemicals Corp Centrifuge having forced solids discharge
US3237770A (en) 1963-03-06 1966-03-01 Wix Corp Filter apparatus
US3344925A (en) * 1964-08-28 1967-10-03 William A Graham Plastic liner for oil filter
US3397135A (en) * 1964-09-21 1968-08-13 Julius L Englesberg Integral pump and filter assembly including electrode means
US3399776A (en) * 1965-09-02 1968-09-03 Robert R. Knuth Detachable snap-on filter for a hydraulic system
US3762960A (en) 1965-11-24 1973-10-02 Teledyne Inc Thermoelectric alloys
JPS448703Y1 (en) 1966-03-25 1969-04-08
DE1525925A1 (en) 1966-09-16 1970-01-22 Vickers Zimmer Ag Flange connection, especially for double pipelines
US3405805A (en) 1966-12-19 1968-10-15 Robert F. Hatter Filter
US3469863A (en) 1967-04-05 1969-09-30 Trico Products Corp Fluid coupling assembly
US3504803A (en) 1967-06-08 1970-04-07 Eagle Empire Corp Paper roll filter structure
US3493115A (en) 1968-01-29 1970-02-03 Ultra Tech Corp Cam lock cartridge system
GB1200821A (en) * 1968-02-22 1970-08-05 Gestetner Ltd Improvements relating to printing apparatus
US3528554A (en) 1968-05-22 1970-09-15 Ogden Filter Co Inc Multiple element,compressible filter assembly
US3580615A (en) 1968-06-24 1971-05-25 Autotrol Corp Softener control assembly
US3519133A (en) 1968-07-09 1970-07-07 Dover Corp Fluid filter means
US3591004A (en) 1968-07-12 1971-07-06 Vernon D Roosa Fuel oil filter design
US3615257A (en) 1968-10-14 1971-10-26 Becton Dickinson Co Filter cassette and holder therefor
US3560377A (en) 1969-01-21 1971-02-02 Amicon Corp Apparatus and process for filtering fluids
US3591002A (en) 1969-01-31 1971-07-06 Parker Hannifin Corp High pressure fluid filter
US3706184A (en) 1969-06-09 1972-12-19 Matter Mfg Corp Wall-recessed suction cleaner
US3734851A (en) 1969-12-29 1973-05-22 K Matsumura Method and device for purifying blood
US3675766A (en) 1970-02-04 1972-07-11 Sol Roy Rosenthal Multiple puncture injector device
US3628662A (en) 1970-03-26 1971-12-21 Marvel Eng Co Filter antidrain valve assembly
US3842870A (en) * 1970-07-20 1974-10-22 Continental Water Cond Quick-disconnect manifold assembly
US3695446A (en) 1970-10-15 1972-10-03 Culligan Int Co Membrane module assembly
US3680985A (en) 1970-12-28 1972-08-01 Mec O Matic The Pump
US3684100A (en) * 1971-04-05 1972-08-15 Sam Close Filter assembly and disposable filter element therefor
US3947080A (en) 1971-06-14 1976-03-30 Underwriters Safety Device Co. Quick-connect-disconnect terminal block assembly
US3880757A (en) * 1971-09-08 1975-04-29 Gary Thomason Filtering system
BE791684A (en) 1971-11-22 1973-03-16 Ogden Hubert S REMOVABLE FILTER CARTRIDGE
US3802564A (en) 1972-06-09 1974-04-09 W Turman Oil filter and adapter
US3812659A (en) 1972-08-02 1974-05-28 Whirlpool Co Canister vacuum cleaner latching means
US3809247A (en) 1972-11-09 1974-05-07 Purex Corp Ltd High throughput filter having multiposition valve
JPS49102377U (en) * 1972-12-22 1974-09-03
US3935106A (en) 1974-01-23 1976-01-27 Lipner Herbert D Water filter assembly
US3950251A (en) 1974-03-25 1976-04-13 Rayne International Filter with quick-connect coupling
GB1496035A (en) 1974-07-18 1977-12-21 Iwaki Co Ltd Magnetically driven centrifugal pump
JPS51111902A (en) 1975-03-26 1976-10-02 Iwaki:Kk Magnet pump
US4075099A (en) 1975-09-02 1978-02-21 The Continental Group, Inc. Integral oil supply and filter
DE2542284C3 (en) * 1975-09-23 1981-06-11 Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal Multiple plug coupling
US4061480A (en) 1976-05-20 1977-12-06 The United States Of America As Represented By The Secretary Of The Navy Vacuum cleaner for radioactively contaminated particles
US4089549A (en) * 1976-10-21 1978-05-16 Stratoflex, Inc. Simultaneous plural fluid conductor connections
US4151823A (en) 1977-07-28 1979-05-01 Grosse Leland J Quick-change oil filter/reservoir system for internal combustion engine
US4174231A (en) 1977-09-08 1979-11-13 Hobgood Harold G Method for flushing the crankcase of an internal combustion engine
JPS54133608A (en) 1978-04-08 1979-10-17 Iwaki Co Ltd Electromagnetic drive type reciprocating pumping plant
NO140919C (en) 1978-04-17 1979-12-12 Helge Dybvig FUEL SYSTEM DEVICE, ESPECIALLY FOR BOATS
JPS5541284Y2 (en) 1978-05-25 1980-09-27
US4187179A (en) 1978-08-14 1980-02-05 Harms John F Electrically grounded filter plate
US4298358A (en) 1979-01-11 1981-11-03 Baxter Travenol Laboratories, Inc. Gas separating and venting filter
DE2904867A1 (en) 1979-02-09 1980-08-21 Gewerk Eisenhuette Westfalia PLUG-IN COUPLING FOR MULTI-WIRE HYDRAULIC CABLES
US4320005A (en) * 1979-03-21 1982-03-16 Degraffenreid Howard T Coalescer or filter end cap
US4228011A (en) * 1979-04-23 1980-10-14 Fram Corporation Fuel oil filter cartridge
US4283284A (en) 1979-07-18 1981-08-11 Baxter Travenol Laboratories, Inc. Hollow fiber dialyzer end seal system
US4321911A (en) 1979-08-15 1982-03-30 Offutt Worthington W Modular solar collector system
US4344777A (en) 1980-01-07 1982-08-17 Siposs George G Directed flow bubble trap for arterial blood
US4311488A (en) 1980-02-06 1982-01-19 Shell Oil Company Process for the upgrading of coal
DE3027994A1 (en) * 1980-07-24 1982-02-25 Daimler-Benz Ag, 7000 Stuttgart FILTER FOR DIESEL FUEL
US4414109A (en) 1980-09-29 1983-11-08 Purex Corporation Multi-ported valve with sealing network between valve body and rotor
JPS57130515A (en) 1981-02-06 1982-08-13 Sumimoto Kagaku Kenkyusho:Kk Filter for lubricating oil for internal combustion engine
WO1983000024A1 (en) * 1981-06-23 1983-01-06 Suzuki, Shinichi Oil filter
US4419234A (en) 1981-09-24 1983-12-06 Pall Corporation Multiple cartridge filter assembly with removable filter cartridge array
US4404103A (en) 1981-11-05 1983-09-13 Drath Edwin H Rocking swivel hose connectors and method
US4416775A (en) 1981-12-14 1983-11-22 Std Filter Company, Inc. In-line filter and cartridge therefor
US4411783A (en) 1981-12-23 1983-10-25 Shiley Incorporated Arterial blood filter with improved gas venting
US4454037A (en) * 1982-09-24 1984-06-12 Conterio Ruth H Insulating jacket for an oil filter
US4494775A (en) * 1982-09-30 1985-01-22 William Nash Company, Inc. Fluid coupling
US4456529A (en) * 1982-10-21 1984-06-26 Applied Diesel Engineering, Inc. Filter device for diesel engines
DE3242956C2 (en) * 1982-11-20 1985-07-18 Sartorius GmbH, 3400 Göttingen Multi-part filter housing
US4507203A (en) * 1983-03-14 1985-03-26 Donaldson Company, Inc. Filter element
US4535997A (en) * 1983-06-24 1985-08-20 Brust John E Sealing system
US4522717A (en) * 1983-06-24 1985-06-11 Brust John E Filter apparatus
US4452695A (en) * 1983-07-14 1984-06-05 Energy Extension Industries Full-flow and by-pass filter conversion system for internal combustion engines
JPS6028008U (en) 1983-07-29 1985-02-25 株式会社デンソー filtration device
DE3327431A1 (en) * 1983-07-29 1985-02-14 Wilhelm 2000 Hamburg Heine DEVICE FOR FILTERING AND SEPARATING FLOW MEDIA, ESPECIALLY FOR WATER DESALINATION AND WATER PURIFICATION BY REVERSE OSMOSIS AND ULTRAFILTRATION
DE3481484D1 (en) * 1983-09-16 1990-04-12 Mitsubishi Rayon Co HOLLOW FIBER FILTER MODULE AND ITS USE IN A WATER PURIFICATION DEVICE.
US4544387A (en) * 1983-09-21 1985-10-01 Agerlid Charles G Outer to inner flow vacuum filter with see through outer enclosure
JPS60179189A (en) * 1984-02-27 1985-09-13 Hitachi Ltd Water purifier
US4609465A (en) * 1984-05-21 1986-09-02 Pall Corporation Filter cartridge with a connector seal
US4645601A (en) * 1984-08-31 1987-02-24 Everpure, Inc. Quick change reverse osmosis assembly
US4618533A (en) * 1984-11-30 1986-10-21 Millipore Corporation Porous membrane having hydrophilic surface and process
US4735193A (en) * 1985-02-08 1988-04-05 Uop Inc. Separation of a monosaccharide with mixed matrix membranes
US4637470A (en) * 1985-06-19 1987-01-20 Hughes Tool Company Subsea hydraulic coupling
US4654142A (en) * 1985-11-18 1987-03-31 Everpure, Inc. Filtering system
US4735716A (en) * 1986-01-27 1988-04-05 Cuno Corporated Quick-change filter cartridge and head therefor
US4642183A (en) * 1986-03-21 1987-02-10 Hebert Alfred M Oil filter
JPH0677654B2 (en) 1986-04-15 1994-10-05 松下電器産業株式会社 Filter
US4859328A (en) 1986-05-30 1989-08-22 Caterpillar Inc. Twist on disposable filter
US4804208A (en) * 1986-08-11 1989-02-14 The Kendall Company Manifold coupling assembly
DE3789449T2 (en) * 1986-11-04 1994-11-03 Osmonics Inc LIQUID FILTER WITH DRY REMAINING HOUSING.
JPS63209712A (en) 1987-02-24 1988-08-31 Nippon Denso Co Ltd Filter element
US4806240A (en) * 1987-06-12 1989-02-21 Cuno, Incorporated Adapter and cartridge assembly
US4814078A (en) * 1987-09-15 1989-03-21 Associated Mills Inc. Water filter cartridge
DE8714819U1 (en) * 1987-11-06 1988-01-07 Pall Deutschland Gmbh, 6072 Dreieich, De
DE3740418A1 (en) * 1987-11-28 1989-06-08 Joachim Wolf FILTER DEVICE
GB2216029B (en) * 1988-03-29 1992-05-06 Joachim Wolf Filter assembly and filter manifold
DE3837423A1 (en) * 1988-11-04 1990-05-10 Bosch Gmbh Robert LIQUID FILTER
US5167837A (en) * 1989-03-28 1992-12-01 Fas-Technologies, Inc. Filtering and dispensing system with independently activated pumps in series
US5101850A (en) * 1989-09-21 1992-04-07 Dresser Industries, Inc. Filter change liquid shutoff safety interlock device
US4944776A (en) * 1989-10-05 1990-07-31 Andrew Corporation Dehumidifier for waveguide system
US5143601A (en) * 1989-10-06 1992-09-01 Water Factory Corporation Fluid purification system
US5221473A (en) * 1989-10-13 1993-06-22 Burrows Bruce D Filter cartridge assembly for a reverse osmosis purification system
JPH0366691U (en) 1989-11-02 1991-06-28
YU212089A (en) * 1989-11-06 1992-05-28 Lazarevic Bogdan Pipeline for gas under high pressure
US5133858A (en) * 1989-11-30 1992-07-28 Layton Manufacturing Corporation Reverse osmosis water purification apparatus
US5139668A (en) * 1989-12-27 1992-08-18 Alberta Research Corporation Hollow fiber bundle element
US5041220A (en) * 1990-01-09 1991-08-20 Minntech Corporation Hollow fiber filter cartridge for a standarized housing
US5342518A (en) * 1990-02-14 1994-08-30 Iraco Filtration Systems, Inc. Filtration system and mount for beverage dispensers and automatic beverage brewing machines
JPH0725272Y2 (en) * 1990-03-02 1995-06-07 株式会社メイスイ Water purifier mounting device
US5077959A (en) * 1990-09-06 1992-01-07 Ferris Industries, Inc. Dual hydrostatic drive walk-behind mower
US5205002A (en) * 1991-02-05 1993-04-27 Sage Passant Peter Coupling apparatus
DE69116386T2 (en) 1991-04-15 1996-09-05 Aegir Bjoernsson FILTER FOR CLEANING OIL
JP2500247Y2 (en) * 1991-06-03 1996-06-05 矢崎総業株式会社 Connector with lever
US5346177A (en) * 1991-06-13 1994-09-13 Fuel Maker Corporation High pressure gas line breakaway connector
ATE130919T1 (en) * 1991-07-09 1995-12-15 Faster Srl QUICK COUPLING FOR ESTABLISHING OR RELEASING THE CONNECTIONS OF SEVERAL COUPLINGS AND/OR CONNECTORS SIMULTANEOUSLY, IN PARTICULAR COUPLING BLOCK FOR ATTACHED FRONT LOADERS ON VEHICLES.
US5667566A (en) * 1991-09-06 1997-09-16 Reading Technologies, Inc. Apparatus for water vapor removal from a compressed gas
JP3144858B2 (en) * 1991-11-06 2001-03-12 株式会社ロキテクノ Manufacturing method of precision membrane pleated filter cartridge
EP0543776B1 (en) * 1991-11-18 1995-10-04 Wilhelm A. Keller Security hook for securing a cartridge to a hand dispenser
US5180490A (en) * 1992-01-31 1993-01-19 Baldwin Filters, Inc. Lubricant filter assembly with internal bypass lock-out
US5304300A (en) * 1992-08-13 1994-04-19 Parsons Charles F RV water filter apparatus
US5308483A (en) * 1992-08-27 1994-05-03 Gelman Sciences Inc. Microporous filtration funnel assembly
USRE36914E (en) * 1992-10-07 2000-10-17 Minntech Corp Dialysate filter including an asymmetric microporous, hollow fiber membrane incorporating a polyimide
DE4236490C1 (en) * 1992-10-29 1994-05-19 Stihl Maschf Andreas Fuel suction head in tank - has plastics housing for filter element inserted through end opening
JP3373234B2 (en) 1992-11-16 2003-02-04 ミリポア・コーポレイション Filtration vessel with pipe fitting
JPH06178972A (en) * 1992-12-14 1994-06-28 Takuma Co Ltd Water purifier
US5284584A (en) * 1992-12-31 1994-02-08 Hoechst Celanese Corporation Hollow fiber membrane fabric - containing cartridges and modules having solvent-resistant thermoplastic tube sheets, and methods for making the same
US5401401A (en) * 1993-01-13 1995-03-28 Aquaria Inc. Hang on tank canister filter
US5389260A (en) * 1993-04-02 1995-02-14 Clack Corporation Brine seal for tubular filter
US5396316A (en) * 1993-10-20 1995-03-07 Hewlett-Packard Company User-replaceable liquid toner cartridge with integral pump and valve mechanisms
JP3320176B2 (en) * 1993-11-30 2002-09-03 山信工業株式会社 Capsule type filter device for liquid
US5484527A (en) * 1993-12-13 1996-01-16 Stanadyne Automotive Corp. Module for filter assembly base
JP3279819B2 (en) * 1994-06-15 2002-04-30 エスエムシー株式会社 Filter device
CN1120520A (en) * 1994-07-08 1996-04-17 三星电子株式会社 Filtering apparatus of water purifier
US5462675A (en) * 1994-07-15 1995-10-31 Pall Corporation Filter assembly and method of reducing hold-up in a filter assembly
US5507959A (en) * 1994-11-04 1996-04-16 Advanced Micro Devices, Inc. Apparatus for wetting, flushing and performing integrity checks on encapsulated PTFE filters
US5445734A (en) * 1994-11-18 1995-08-29 Chen; Ching-Wen Water filter
US5902551A (en) * 1995-01-13 1999-05-11 Semi-Gas Systems, Inc. Process gas docking station with point-of-use filter for receiving removable purifier cartridges
US5928516A (en) * 1995-01-20 1999-07-27 Pall Corporation Filter package
US5643467A (en) * 1995-05-03 1997-07-01 R.R. Street & Co. Inc. Filter cartridge having gasket seal employing pressure ridges to prevent leakage
US5507530A (en) * 1995-05-08 1996-04-16 Soo Tractor Sweeprake Company Plural male and female fluid coupler connecting mechanism and method
US5531899A (en) * 1995-06-06 1996-07-02 Millipore Investment Holdings Limited Ion exchange polyethylene membrane and process
US5653871A (en) * 1996-04-24 1997-08-05 Everpure, Inc. Filter assembly with O-ring protection
JPH10314A (en) 1996-06-14 1998-01-06 Toyo Roki Seizo Kk Filter
US5762789A (en) * 1996-06-28 1998-06-09 Millipore Corporation Disposable membrane module with low-dead volume
US6068770A (en) * 1996-07-12 2000-05-30 Millipore Corporation Disposable separation module with quick connect capability
US5965019A (en) * 1996-11-26 1999-10-12 Cuno Incorporated Encapsulated lenticular filter cartridge
JPH10165776A (en) 1996-12-11 1998-06-23 Brother Ind Ltd Purifying device
US6048454A (en) * 1997-03-18 2000-04-11 Jenkins; Dan Oil filter pack and assembly
GB9707218D0 (en) * 1997-04-08 1997-05-28 Lucas Ind Plc Filter arrangement
JPH10337447A (en) * 1997-06-05 1998-12-22 Nitto Denko Corp Filter for liquid filtration, membrane element, and method of connecting housing and membrane element
US6001249A (en) * 1997-11-06 1999-12-14 Dart Industries Inc. Multi-stage water filter system
JP3354855B2 (en) * 1997-12-15 2002-12-09 オリオン機械株式会社 filter
US6095572A (en) * 1998-01-20 2000-08-01 Optimize Technologies, Inc. Quarter turn quick connect fitting
AU2560299A (en) 1998-01-20 1999-08-02 Silicon Image, Inc. Cmos driver and on-chip termination for gigabaud speed data communication
JP2000325712A (en) 1999-05-24 2000-11-28 Nippon Millipore Kk Filter housing device
EP1775003B1 (en) * 2000-05-12 2009-12-23 Pall Corporation Filtration systems
JP3723749B2 (en) * 2001-06-06 2005-12-07 ジョプラックス株式会社 Twin cartridge type water purifier

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257888A (en) * 1979-05-01 1981-03-24 Kudryavtsev Boris B Cartridge filter
US4743365A (en) * 1985-08-26 1988-05-10 Noland Wayne B Valve filter mechanism
US4719012A (en) * 1986-05-30 1988-01-12 Caterpillar Inc. Twist on disposable filter
US4904382A (en) * 1987-11-23 1990-02-27 Everpure, Inc. Filter cartridge security for locking between operating and non-operating positions
US5022986A (en) * 1990-01-11 1991-06-11 John Lang Manifold and disposable filter assembly
EP0640369A1 (en) * 1993-08-09 1995-03-01 Robert Bosch Gmbh Liquid filter
US5611922A (en) * 1993-08-16 1997-03-18 Donaldson Company Filter cartridge retention system
US5762787A (en) * 1995-01-13 1998-06-09 Ziba Design, Inc. Fluid filtration system having a readily detachable cartridge filter

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6982041B2 (en) 2000-09-13 2006-01-03 Mykrolis Corporation Liquid filtration device
EP1479428A3 (en) * 2003-05-23 2005-03-09 SGT Singapore Holdings Pte Ltd. c.i.p.o.f. Quick-change filter system and a base and a quick-change filter intended for such a system
US6918952B2 (en) 2003-05-23 2005-07-19 Sgt Singapore Holdings Pte Ltd. Quick-change filter system and a base and a quick-change filter intended for such a system
US7399346B2 (en) 2003-05-23 2008-07-15 Scientific Glass Technology Singapore Pte Ltd. Quick-change filter system and a base and a quick-change filter intended for such a system
EP2095861A1 (en) * 2003-05-23 2009-09-02 Scientific Glass Technology Singapore Pte Ltd. Quick-change filter system and a base and a quick-change filter intended for such a system
US7767083B2 (en) 2004-04-15 2010-08-03 Pall Corporation Fluid treatment arrangements and methods for operating fluid treatment arrangements
US20100294709A1 (en) * 2004-04-15 2010-11-25 Pall Corporation Fluid treatment arrangements and methods for operating fluid treatment arrangements
US8795524B2 (en) * 2004-04-15 2014-08-05 Pall Corporation Fluid treatment arrangements and methods for operating fluid treatment arrangements
US8097157B2 (en) 2005-07-20 2012-01-17 3M Innovative Properties Company Fluid filtration system
US8097156B2 (en) 2005-07-20 2012-01-17 3M Innovative Properties Company Fluid filtration system
US8709246B2 (en) 2008-09-16 2014-04-29 3M Innovative Properties Company Filter cartridge and system using linear actuation

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DE60140910D1 (en) 2010-02-04
US7807055B2 (en) 2010-10-05
JP2004503356A (en) 2004-02-05
ATE317719T1 (en) 2006-03-15
US20030213738A1 (en) 2003-11-20
JP2011062695A (en) 2011-03-31
KR100850340B1 (en) 2008-08-04
US7338599B2 (en) 2008-03-04
US20080164197A1 (en) 2008-07-10
JP5425746B2 (en) 2014-02-26
DE60117260T2 (en) 2006-10-05
US20110005989A1 (en) 2011-01-13
WO2001095993A3 (en) 2002-04-25
EP1286746A2 (en) 2003-03-05
EP1286746B1 (en) 2006-02-15
US8293104B2 (en) 2012-10-23
EP1775003B1 (en) 2009-12-23
JP4649092B2 (en) 2011-03-09
EP1775003A1 (en) 2007-04-18
DE60117260D1 (en) 2006-04-20
KR20030022122A (en) 2003-03-15

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