US20080031755A1 - Variable flow fluid pump - Google Patents
Variable flow fluid pump Download PDFInfo
- Publication number
- US20080031755A1 US20080031755A1 US11/888,796 US88879607A US2008031755A1 US 20080031755 A1 US20080031755 A1 US 20080031755A1 US 88879607 A US88879607 A US 88879607A US 2008031755 A1 US2008031755 A1 US 2008031755A1
- Authority
- US
- United States
- Prior art keywords
- flapper
- fluid
- dome
- base plate
- valve seat
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 59
- 238000004891 communication Methods 0.000 claims description 3
- 239000012815 thermoplastic material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 10
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 1
- 210000003811 finger Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1037—Flap valves
- F04B53/1047—Flap valves the valve being formed by one or more flexible elements
- F04B53/106—Flap valves the valve being formed by one or more flexible elements the valve being a membrane
- F04B53/1065—Flap valves the valve being formed by one or more flexible elements the valve being a membrane fixed at its centre
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/14—Pumps characterised by muscle-power operation
Definitions
- This invention relates to valves, and more particularly to valves which are adapted to control fluid flow into a chamber of an inflatable bladder.
- the fluid pump of the invention provides a versatile system capable of pumping fluids having a variety of densities and viscosities.
- the pump assembly includes a resilient dome attached at its periphery to a base plate, which together define a chamber.
- the base plate has a raised annular valve seat and a raised center boss which supports a flapper thereon, the flapper capable of sealing against the valve seat to selectively open or close a plurality of fluid inlet apertures in the base plate.
- a fluid outlet check valve is connected in fluid communication with the dome. Compression of the dome causes the flapper to seal against the valve seat and expels fluid from the chamber out through the fluid outlet valve.
- the pump assembly can be made to accommodate a variety of fluid densities and viscosities by varying the material and thickness of the flapper, the respective heights of the valve seat and the center boss, and the size and number of the fluid inlet apertures.
- FIG. 1 is a cross-sectional side view of an exemplary pump in an at-rest state.
- FIG. 2 is a cross-sectional side view of the pump of FIG. 1 in a compression or dispensing stroke.
- FIG. 3 is a cross-sectional side view of the pump of FIG. 1 in a recovery mode.
- FIG. 4 is a top view of the base plate of the pump of FIG. 1 .
- FIG. 5 is a cross-sectional side view of the base plate and flapper valve of the pump of FIG. 1 prior to assembly.
- FIGS. 1 and 4 - 5 show the structural details of an embodiment of the invention.
- FIG. 1 is a cross-sectional side view of a pump assembly 10 in an at-rest state.
- Pump assembly 10 includes a resilient dome 12 .
- the resilient dome 12 may be made from a low durometer thermoplastic material, such as a urethane or an olefin (e.g. ethylene or polypropylene), though this list of materials is considered merely illustrative, and not limiting.
- Dome 12 is substantially hemispherical in shape and has a flange 13 at a lower end thereof which is received under film 18 of an inflatable bladder to which the pump assembly 10 is to be secured.
- Flange 13 of dome 12 is secured to a base plate 14 , the dome 12 and base plate 14 together creating a chamber within the pump assembly 10 .
- Base plate 14 is typically molded from a high durometer thermoplastic material, such as a urethane or an olefin (e.g. ethylene or polypropylene), though, once again, this list of materials is considered merely illustrative, and not limiting. Details of base plate 14 can be seen in FIGS. 4 and 5 .
- Base plate 14 has a valve seat 24 in the form of a raised annular ridge extending up from a flat lower surface of the base plate 14 .
- a raised element comprising a circular center boss 23
- a flapper mount 22 extending up from the center boss 23 .
- Flapper 16 is a substantially annular flat disk, typically die cut, from almost any thermoplastic or thermosetting material, including a wide variety of rubbers and silicones, as well as semi-rigid plastic films of various thicknesses.
- the material of the flapper 16 must be compatible with whatever fluid is being pumped.
- the thickness and stiffness of the flapper 16 are selected to give a desired response for the particular fluid being pumped.
- Fluid outlet valve 20 Connected to a lower portion of the dome 12 that is located within the bladder when the pump is mounted to the bladder is a fluid outlet valve 20 in fluid communication with the pump assembly chamber.
- Fluid outlet valve 20 is a check valve and may be implemented using a valve such as that disclosed in U.S. Pat. No. 5,564,143. Any suitable check valve known in the art can be used.
- the outlet valve 20 may lead to an evacuation channel external to film 18 to direct fluid out of the bladder.
- the flapper 16 is placed on the flapper mount 22 of the base plate 14 , which initially has a cylindrical shape of a uniform first diameter. After the flapper 16 is placed on the flapper mount 22 , the free end of the flapper mount 22 is altered so that it forms a button having a second diameter, which is larger than the first diameter, to retain the flapper 16 thereon. Attachment of the flapper 16 to the flapper mount 22 of the base plate 14 can be accomplished mechanically using heat or sonic energy. As mentioned above, the material and the thickness of the flapper 16 are selected to provide a desired response to the particular fluid to be pumped. In designing the base plate 14 , there are several features whose dimensions are selected based upon the particular fluid to be pumped.
- the center boss 23 of the base plate 14 serves as a height adjuster.
- the height h 1 of the center boss 23 and the height h 2 of the valve seat 24 are each selected based on the properties of the fluid to be pumped. Whether h 2 is bigger than, the same as, or less than h 1 will affect how difficult it is for the seal between the flapper 16 and the valve seat 24 to be released, with an easy release being desirable for thicker fluids, and a tighter release being preferable for thinner fluids.
- the contact area between the flapper 16 and the valve seat 24 is reduced, making release of the flapper 16 from the valve seat 24 easier, and enabling the ease with which it is released more controllable as compared to a valve having a flat flapper 16 contacting a planar surface over most of its surface when closed (not shown).
- the resiliency of the flapper 16 may be controlled by selecting certain materials and/or dimensions of the flapper 16 . The resiliency of the flapper affects the amount of deflection of the flapper 16 and thus the flow rate of fluid through the fluid inlet apertures 26 .
- a user places a digit, such as a thumb or finger, on dome 12 and applies a compressive downward force, shown in FIG. 2 as arrow C.
- Pressing the dome 12 downward towards base plate 14 exerts pressure, shown as arrows P, on the flapper 16 which causes the flapper 16 to seal against valve seat 24 , thereby preventing the fluid from exiting the pump assembly 10 via fluid inlet apertures 26 .
- Fluid is, instead, forced out of the fluid outlet valve 20 .
- the dome will return to its original shape, creating a vacuum force within the dome, shown in FIG. 3 by the arrow V.
Abstract
A pump assembly including a resilient dome attached to a base plate, which together define a chamber. A flapper, supported on a raised center boss on the base plate, seats against a raised annular valve seat to selectively expose fluid inlet apertures in the base plate. The dome has a one-way fluid outlet valve. Dome compression seals the flapper against the valve seat and expels fluid through the fluid outlet valve. Release of the dome allows the outlet valve to close, and the dome regain its original shape, thereby creating a vacuum force that unseats the flapper and draws fluid into the chamber via the fluid inlet apertures. The pump assembly can be made for a variety of fluid densities and viscosities by varying the material and thickness of the flapper, the heights of the valve seat and the center boss, and the size and number of the fluid inlet apertures.
Description
- This application claims the benefit of U.S. provisional patent application Ser. No. 60/834,920 filed Aug. 2, 2006, the entire contents of which are incorporated herein by reference.
- This invention relates to valves, and more particularly to valves which are adapted to control fluid flow into a chamber of an inflatable bladder.
- The fluid pump of the invention provides a versatile system capable of pumping fluids having a variety of densities and viscosities. The pump assembly includes a resilient dome attached at its periphery to a base plate, which together define a chamber. The base plate has a raised annular valve seat and a raised center boss which supports a flapper thereon, the flapper capable of sealing against the valve seat to selectively open or close a plurality of fluid inlet apertures in the base plate. A fluid outlet check valve is connected in fluid communication with the dome. Compression of the dome causes the flapper to seal against the valve seat and expels fluid from the chamber out through the fluid outlet valve. Release of the dome enables the fluid outlet valve to close, and enables the dome to return to its original shape, thereby creating a vacuum force that unseats the flapper and draws fluid into the chamber via the fluid inlet apertures. The pump assembly can be made to accommodate a variety of fluid densities and viscosities by varying the material and thickness of the flapper, the respective heights of the valve seat and the center boss, and the size and number of the fluid inlet apertures.
- In the drawings, in which like reference numerals indicate corresponding parts in all views:
-
FIG. 1 is a cross-sectional side view of an exemplary pump in an at-rest state. -
FIG. 2 is a cross-sectional side view of the pump ofFIG. 1 in a compression or dispensing stroke. -
FIG. 3 is a cross-sectional side view of the pump ofFIG. 1 in a recovery mode. -
FIG. 4 is a top view of the base plate of the pump ofFIG. 1 . -
FIG. 5 is a cross-sectional side view of the base plate and flapper valve of the pump ofFIG. 1 prior to assembly. - A description of the embodiments of the present invention will now be had by way of example, and not limitation, with reference to
FIGS. 1 through 5 . -
FIGS. 1 and 4 -5 show the structural details of an embodiment of the invention.FIG. 1 is a cross-sectional side view of apump assembly 10 in an at-rest state.Pump assembly 10 includes aresilient dome 12. Theresilient dome 12 may be made from a low durometer thermoplastic material, such as a urethane or an olefin (e.g. ethylene or polypropylene), though this list of materials is considered merely illustrative, and not limiting.Dome 12 is substantially hemispherical in shape and has a flange 13 at a lower end thereof which is received underfilm 18 of an inflatable bladder to which thepump assembly 10 is to be secured. Flange 13 ofdome 12 is secured to abase plate 14, thedome 12 andbase plate 14 together creating a chamber within thepump assembly 10. -
Base plate 14 is typically molded from a high durometer thermoplastic material, such as a urethane or an olefin (e.g. ethylene or polypropylene), though, once again, this list of materials is considered merely illustrative, and not limiting. Details ofbase plate 14 can be seen inFIGS. 4 and 5 .Base plate 14 has avalve seat 24 in the form of a raised annular ridge extending up from a flat lower surface of thebase plate 14. In the center of the annulus of thevalve seat 24 is a raised element comprising acircular center boss 23, and extending up from thecenter boss 23 is aflapper mount 22. Extending through thebase plate 14 in the area between theannular valve seat 24 and thecenter boss 23 are a plurality offluid inlet apertures 26, typically four to six (seeFIG. 4 ). The number and size of the fluid inlet ports is selected depending on the properties of the fluid being dispensed, and the volume of and/or speed with which the fluid is to be moved. - Mounted on the
flapper mount 22 is aflapper 16. Flapper 16 is a substantially annular flat disk, typically die cut, from almost any thermoplastic or thermosetting material, including a wide variety of rubbers and silicones, as well as semi-rigid plastic films of various thicknesses. The material of theflapper 16 must be compatible with whatever fluid is being pumped. The thickness and stiffness of theflapper 16 are selected to give a desired response for the particular fluid being pumped. - Connected to a lower portion of the
dome 12 that is located within the bladder when the pump is mounted to the bladder is afluid outlet valve 20 in fluid communication with the pump assembly chamber.Fluid outlet valve 20 is a check valve and may be implemented using a valve such as that disclosed in U.S. Pat. No. 5,564,143. Any suitable check valve known in the art can be used. Theoutlet valve 20 may lead to an evacuation channel external to film 18 to direct fluid out of the bladder. - As can be seen in
FIG. 5 , theflapper 16 is placed on theflapper mount 22 of thebase plate 14, which initially has a cylindrical shape of a uniform first diameter. After theflapper 16 is placed on theflapper mount 22, the free end of theflapper mount 22 is altered so that it forms a button having a second diameter, which is larger than the first diameter, to retain theflapper 16 thereon. Attachment of theflapper 16 to theflapper mount 22 of thebase plate 14 can be accomplished mechanically using heat or sonic energy. As mentioned above, the material and the thickness of theflapper 16 are selected to provide a desired response to the particular fluid to be pumped. In designing thebase plate 14, there are several features whose dimensions are selected based upon the particular fluid to be pumped. Thecenter boss 23 of thebase plate 14 serves as a height adjuster. The height h1 of thecenter boss 23 and the height h2 of thevalve seat 24 are each selected based on the properties of the fluid to be pumped. Whether h2 is bigger than, the same as, or less than h1 will affect how difficult it is for the seal between theflapper 16 and thevalve seat 24 to be released, with an easy release being desirable for thicker fluids, and a tighter release being preferable for thinner fluids. By providing avalve seat 24 that is raised above the lower surface of thebase plate 14, the contact area between theflapper 16 and thevalve seat 24 is reduced, making release of theflapper 16 from thevalve seat 24 easier, and enabling the ease with which it is released more controllable as compared to a valve having aflat flapper 16 contacting a planar surface over most of its surface when closed (not shown). Further, the resiliency of theflapper 16 may be controlled by selecting certain materials and/or dimensions of theflapper 16. The resiliency of the flapper affects the amount of deflection of theflapper 16 and thus the flow rate of fluid through thefluid inlet apertures 26. - In operation, a user places a digit, such as a thumb or finger, on
dome 12 and applies a compressive downward force, shown inFIG. 2 as arrow C. Pressing thedome 12 downward towardsbase plate 14 exerts pressure, shown as arrows P, on theflapper 16 which causes theflapper 16 to seal againstvalve seat 24, thereby preventing the fluid from exiting thepump assembly 10 viafluid inlet apertures 26. Fluid is, instead, forced out of thefluid outlet valve 20. Upon release of the compressive force by the user on thedome 12, due to the shape and resilient nature of the material of the dome, the dome will return to its original shape, creating a vacuum force within the dome, shown inFIG. 3 by the arrow V. With the fluidoutlet check valve 20 closed, this vacuum force pulls theflapper 16 away from thevalve seat 24 and draws fluid into the chamber of thepump assembly 10 via thefluid inlet apertures 26. Once thedome 12 returns to its original shape, theflapper 16 reseats itself on thevalve seat 24 and the pump assembly returns to the at-rest state shown inFIG. 1 where no fluid is flowing either into or out of thepump assembly 10. - While this invention has been described with reference to one or more embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit or scope of this invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention.
Claims (8)
1. A fluid pump comprising:
a dome having a flange;
a base plate secured to the flange at a periphery of the base plate;
the base plate including a flapper mount for receiving a central portion of a flapper;
the base including a valve seat for engaging a peripheral portion of the flapper to form a fluid seal;
the base plate including an inlet aperture positioned beneath the flapper; and
an outlet valve in fluid communication with the dome.
2. The fluid pump of claim 1 wherein:
the flapper mount is positioned on a raised boss extending from the base plate.
3. The fluid pump of claim 1 wherein:
a height of boss versus a height of valve seat is set to control fluid flow through the pump.
4. The fluid pump of claim 1 wherein:
the inlet aperture includes a plurality of inlet apertures.
5. The fluid pump of claim 4 wherein:
the size and number of inlet apertures is set to control fluid flow through pump.
6. The fluid pump of claim 1 wherein:
dome is made from a low durometer thermoplastic material
7. The fluid pump of claim 1 wherein:
the dome is substantially hemispherical.
8. The fluid pump of claim 1 further comprising:
a flapper mount extending up from the boss, the flapper mount receiving the flapper.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/888,796 US20080031755A1 (en) | 2006-08-02 | 2007-08-02 | Variable flow fluid pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US83492006P | 2006-08-02 | 2006-08-02 | |
US11/888,796 US20080031755A1 (en) | 2006-08-02 | 2007-08-02 | Variable flow fluid pump |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080031755A1 true US20080031755A1 (en) | 2008-02-07 |
Family
ID=39029348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/888,796 Abandoned US20080031755A1 (en) | 2006-08-02 | 2007-08-02 | Variable flow fluid pump |
Country Status (1)
Country | Link |
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US (1) | US20080031755A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080257418A1 (en) * | 2007-04-20 | 2008-10-23 | Fisher Controls International Llc | Pressure Averaging Sense Tube For Gas Regulator |
US20080257427A1 (en) * | 2007-04-20 | 2008-10-23 | Fisher Controls International Llc | Service Regulator with Improved Boost Performance |
US20080257423A1 (en) * | 2007-04-20 | 2008-10-23 | Fisher Controls International Llc | Secondary Seat for Gas Regulator |
US20080258095A1 (en) * | 2007-04-20 | 2008-10-23 | Fisher Controls International Llc | Adjustable Disc Mechanism for Gas Regulator |
US20080258096A1 (en) * | 2007-04-20 | 2008-10-23 | Fisher Controls International Llc | Gas Regulator Flow Boost Cartridge |
US20080257424A1 (en) * | 2007-04-20 | 2008-10-23 | Fisher Controls International Llc | Flow Valve Port for a Gas Regulator |
CN105443340A (en) * | 2015-12-25 | 2016-03-30 | 北京东方园林生态股份有限公司 | Portable water pumping device capable of adjusting probing depth |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4995864A (en) * | 1989-08-15 | 1991-02-26 | Imed Corporation | Dual chamber pumping apparatus |
US5074765A (en) * | 1990-04-13 | 1991-12-24 | Dielectrics Industries | Elastomeric air pump |
US5144708A (en) * | 1991-02-26 | 1992-09-08 | Dielectrics Industries | Check valve for fluid bladders |
US5564143A (en) * | 1995-03-09 | 1996-10-15 | Dielectrics Industries | Check valve for fluid bladders |
US5895208A (en) * | 1996-09-26 | 1999-04-20 | Knf Neuberger Gmbh | Reciprocating piston machine with capillary passages on valves for pressure relief |
US6196260B1 (en) * | 1998-10-21 | 2001-03-06 | Dielectrics Industries, Inc. | Flow control valve |
US6206664B1 (en) * | 1999-05-11 | 2001-03-27 | Okenseiko Co., Ltd. | Compact pump |
US6378552B1 (en) * | 2000-11-10 | 2002-04-30 | Dielectrics Industries, Inc. | Dual speed flow control valve |
US20060045780A1 (en) * | 2004-09-01 | 2006-03-02 | Pekar Robert W | Outlet check valve for fluid bladders |
US20070163652A1 (en) * | 2006-01-04 | 2007-07-19 | Pekar Robert W | Release valve |
-
2007
- 2007-08-02 US US11/888,796 patent/US20080031755A1/en not_active Abandoned
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4995864A (en) * | 1989-08-15 | 1991-02-26 | Imed Corporation | Dual chamber pumping apparatus |
US5074765A (en) * | 1990-04-13 | 1991-12-24 | Dielectrics Industries | Elastomeric air pump |
US5144708A (en) * | 1991-02-26 | 1992-09-08 | Dielectrics Industries | Check valve for fluid bladders |
US5564143A (en) * | 1995-03-09 | 1996-10-15 | Dielectrics Industries | Check valve for fluid bladders |
US5895208A (en) * | 1996-09-26 | 1999-04-20 | Knf Neuberger Gmbh | Reciprocating piston machine with capillary passages on valves for pressure relief |
US6196260B1 (en) * | 1998-10-21 | 2001-03-06 | Dielectrics Industries, Inc. | Flow control valve |
US6206664B1 (en) * | 1999-05-11 | 2001-03-27 | Okenseiko Co., Ltd. | Compact pump |
US6378552B1 (en) * | 2000-11-10 | 2002-04-30 | Dielectrics Industries, Inc. | Dual speed flow control valve |
US20060045780A1 (en) * | 2004-09-01 | 2006-03-02 | Pekar Robert W | Outlet check valve for fluid bladders |
US7261525B2 (en) * | 2004-09-01 | 2007-08-28 | Dielectrics Industries, Inc. | Outlet check valve for fluid bladders |
US20070163652A1 (en) * | 2006-01-04 | 2007-07-19 | Pekar Robert W | Release valve |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080257418A1 (en) * | 2007-04-20 | 2008-10-23 | Fisher Controls International Llc | Pressure Averaging Sense Tube For Gas Regulator |
US20080257427A1 (en) * | 2007-04-20 | 2008-10-23 | Fisher Controls International Llc | Service Regulator with Improved Boost Performance |
US20080257423A1 (en) * | 2007-04-20 | 2008-10-23 | Fisher Controls International Llc | Secondary Seat for Gas Regulator |
US20080258095A1 (en) * | 2007-04-20 | 2008-10-23 | Fisher Controls International Llc | Adjustable Disc Mechanism for Gas Regulator |
US20080258096A1 (en) * | 2007-04-20 | 2008-10-23 | Fisher Controls International Llc | Gas Regulator Flow Boost Cartridge |
US20080257424A1 (en) * | 2007-04-20 | 2008-10-23 | Fisher Controls International Llc | Flow Valve Port for a Gas Regulator |
US8156958B2 (en) * | 2007-04-20 | 2012-04-17 | Fisher Controls International Llc | Service regulator with improved boost performance |
US8256452B2 (en) | 2007-04-20 | 2012-09-04 | Fisher Controls International Llc | Gas regulator flow boost cartridge |
US8336574B2 (en) | 2007-04-20 | 2012-12-25 | Fisher Controls International Llc | Pressure averaging sense tube for gas regulator |
US8500092B2 (en) | 2007-04-20 | 2013-08-06 | Fisher Controls International Llc | Secondary seat for gas regulator |
CN105443340A (en) * | 2015-12-25 | 2016-03-30 | 北京东方园林生态股份有限公司 | Portable water pumping device capable of adjusting probing depth |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DIELECTRICS INDUSTRIES, INC., MASSACHUSETTS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PEKAR, ROBERT W.;REEL/FRAME:019961/0022 Effective date: 20070808 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |