US20050158191A1 - Highly accurate pumping device - Google Patents
Highly accurate pumping device Download PDFInfo
- Publication number
- US20050158191A1 US20050158191A1 US10/760,765 US76076504A US2005158191A1 US 20050158191 A1 US20050158191 A1 US 20050158191A1 US 76076504 A US76076504 A US 76076504A US 2005158191 A1 US2005158191 A1 US 2005158191A1
- Authority
- US
- United States
- Prior art keywords
- chamber
- plunger
- pumping device
- seal
- lead screw
- 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
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
- F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
-
- 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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- 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
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
Definitions
- Pumps typically are comprised of many pieces with many stringent manufacturing requirements necessary for such accurate aspirating and dispensing.
- the pumping device is comprised of a stepper motor, a lead screw, a coupler linking the stepper motor shaft to the lead screw, an anti-backlash nut coupled to the lead screw, an anti-rotation arm coupled to the anti-backlash nut, a plunger coupled to the anti-rotation arm, a top section, an end cap and a housing with a slot for the anti-rotation arm and mounts for an end-of-travel sensor.
- the top section is comprised of a bearing for locating one end of the lead screw, a pumping chamber, one or more ports and a recessed area for a seal, which seals against the plunger and the sides of the recessed area.
- the end cap is located such as to retain the seal in the recessed area of the top section.
- Activation of the stepper motor causes the plunger to move axially into or out of the pumping chamber thus dispensing or aspirating fluid.
- Accurate aspiration and dispensing of fluids is accomplished with the use of the anti-rotation slot, the anti-backlash nut and by adjusting several factors such as the pitch of the lead screw, the diameter of the plunger and the actuation of the stepper motor. Exchanging a minimal number of parts allows the pump to aspirate and dispense different volumes of fluids.
- the self-aligning features of the pump allow the pump to be easily reconfigured.
- FIG. 1A is a front perspective view of the pumping device.
- FIG. 1B is a rear perspective view of the pumping device.
- FIG. 2 is a cross sectional view of the pumping device of FIG. 1A .
- FIG. 3A is a perspective view of a first top.
- FIG. 3B is a cross sectional side view of a first top in FIG. 3A showing a bearing, a seal and the end cap.
- FIG. 3C is a cross sectional view of a second top without the bearing, seal and end cap.
- FIG. 4 is a perspective view of the end cap.
- FIG. 5A is a perspective view of the housing.
- FIG. 5B is a cross sectional side view of the housing in FIG. 5A .
- FIG. 5C is a rear view of the housing in FIG. 5A .
- FIG. 6 is a perspective view of the anti-rotation arm.
- FIG. 7 is a perspective view of the anti-backlash nut, lead screw, anti-rotation arm and a first plunger assembly.
- FIG. 8A is a cross sectional view of a first plunger in FIG. 7 .
- FIG. 8B is a cross sectional view of a second plunger.
- FIG. 9 is a perspective view of the coupler.
- FIG. 10 is a perspective view of the lead screw.
- FIG. 11 is a perspective view of the lead screw, anti-backlash nut, plunger, anti-rotation arm and coupler assembly.
- FIG. 12A is a perspective view of a first seal.
- FIG. 12B is a perspective view of a second seal.
- FIG. 13 is a perspective view of the stepper motor.
- FIG. 14 is a perspective view of the lead screw, anti-backlash nut, anti-rotation arm, plunger, coupler and stepper motor assembly.
- FIGS. 1A and 1B Shown in FIGS. 1A and 1B is a highly accurate pumping device comprised of a first top section 1 , an end cap 17 , a housing 7 , a first plunger 18 , an anti-rotation arm 6 , a sensor 8 and a stepper motor 10 . Also shown in FIG. 1A are an inlet port 12 and an outlet port 13 . The number and location of the ports can vary. An adjustment knob 45 is attached to the motor 10 to manually adjust the position of the first plunger 18 .
- the coupler 9 connects the shaft 11 of the stepper motor 10 to the lead screw 4 .
- the lead screw 4 is located in a first top section 1 by means of a bearing 3 .
- the anti-rotation arm 6 is connected to the anti-backlash nut 5 , which moves axially along the lead screw 4 when the stepper motor 10 is activated.
- a first plunger 18 is attached to the arm 6 by means of a screw 29 .
- a first seal 14 is retained in a first top section 1 by means of an end cap 17 .
- a first plunger 18 is moved axially through a first seal 14 when the stepper motor 10 is activated.
- a sensor 8 located on the housing 7 is used for determining position of a first plunger 18 . The number and location of the sensor 8 on the housing may vary.
- the adjustment knob 45 is attached on the motor 10 distally from the housing 7 .
- FIG. 3A shows a first top section 1 with a plurality of holes 38 used to attach the top section 1 to the housing as described below.
- FIG. 3B shows the configuration of a first top section 1 .
- the bearing 3 which locates the lead screw as described above, is located in a hole 34 .
- a first seal 14 is located in a recessed area 16 .
- the end cap 17 is attached to the top section 1 such that its central hole, as described below, is axially aligned with a first chamber 31 and attached to the top section 1 .
- the end cap 17 retains the seal 14 in the recessed area 16 .
- An outlet port 13 is located at the top surface of the top section 1 and is axially aligned with a first chamber 31 .
- the chamber is substantially cylindrical in shape.
- a conical section 33 of a first chamber 31 assists in removal of air bubbles when liquid is dispensed.
- the inlet port 12 is located above the seal 14 perpendicular to the chamber 31 to assist in removal of air bubbles from around the seal 14 when liquid is aspirated.
- a recessed area 23 is used to axially align the top section 1 with the housing
- a second top section 2 is shown in FIG. 3C .
- a second chamber 32 allows for a different volume to be aspirated or dispensed.
- the chamber is substantially cylindrical in shape.
- a second seal, as described below, is located in a second hole 44 .
- the outlet port 13 is axially aligned with the second chamber 32 .
- a conical section 42 of the second chamber 32 assists in removal of air bubbles when liquid is dispensed.
- a hole 34 is used to locate a bearing as described above.
- a recessed area 23 is used to axially align the second top section 2 with the housing as described below.
- the inlet port 12 is located perpendicular to the chamber 31 to assist in removal of air bubbles from around the seal when liquid is aspirated as described above.
- the end cap 17 shown in FIG. 4 , is comprised of a central hole 41 and a plurality of holes 40 used to attach the end cap 17 to the top section.
- the central hole 41 is axially aligned with the chamber in the top section as described above.
- FIG. 5A shows the housing 7 with a plurality of holes 39 which are used to attach the housing 7 to the top section as described above.
- the boss 22 is used to axially align the housing 7 with the top section as described above.
- a slot 25 is provided for movement of the end of travel protrusion of the anti-rotational arm as described below.
- a second slot 24 prevents the anti-rotation arm from rotating as described below.
- a plurality of holes 43 is used to attach the housing to the stepper motor as described below.
- FIG. 5B shows the housing 7 , which includes a boss 22 used to axially align the housing 7 with the top section as described above.
- a recessed area 21 is used to axially align the housing 7 with the stepper motor as described below.
- FIG. 5C A rear view of the housing 7 is shown in FIG. 5C .
- Mounting supports 26 and a slot 30 allow for the attachment of the sensor as described above.
- the anti-rotation arm 6 is shown in FIG. 6 . It contains a protrusion 37 which is used with the sensor to indicate position of the plunger as described above. A hole 46 is used to attach the plunger as described below to the anti-rotation arm 6 .
- FIG. 7 shows the assembly of the lead screw 4 , the anti-backlash nut 5 , the anti-rotation arm 6 and a first plunger 18 .
- FIG. 8A shows a first plunger 18 with a threaded hole 35 used to attach the plunger to the anti-rotational arm as described above.
- the plunger may be attached to the anti-rotation arm by means other than screws.
- FIG. 8B shows a second plunger 19 with a diameter different from that of the first plunger.
- a threaded hole 35 is used to attach the plunger to the anti-rotation arm as described above.
- the plunger may be attached to the anti-rotation arm by means other than screws.
- FIG. 9 shows one version of a coupler 9 that is used to connect the shaft of the stepper motor to the lead screw as described above.
- Other configurations of the coupler are possible.
- FIG. 10 shows the lead screw 4 .
- the proximal end 28 is connected to the coupler as described above.
- the distal end 27 is inserted into the bearing as described above.
- the proximal end 28 and the distal end 27 may be of same or different diameters.
- FIG. 11 shows an assembly consisting of the lead screw 4 , the anti-backlash nut 5 , the anti-rotation arm 6 , a first plunger 18 and the coupler 9 .
- the anti-backlash nut is self-adjusting to take out any backlash between the lead screw and the motor.
- a first seal 14 is shown in FIG. 12A .
- the seal is a u-cup shape with an internal diameter sized for the first plunger.
- the outer diameter seals against the recessed area of the top section as described above.
- a second seal 15 is shown in FIG. 12B .
- the seal is a u-cup shape with an internal diameter sized for the second plunger.
- the outer diameter seals against the recessed area of the top section as described above.
- the stepper motor 10 is shown in FIG. 13 .
- a boss 20 on the motor is used to axially align the motor to the housing as described above.
- a wiring connector 36 provides for power to the motor.
- FIG. 14 shows the arrangement between the stepper motor 10 , the coupler 9 , the lead screw 4 , the anti-backlash nut 5 , the anti-rotation arm 6 and a first plunger 18 .
- the stepper motor 10 turns the coupler 9 which in turn rotates the lead screw 4 .
- the anti-backlash nut 5 travels axially along the lead screw 4 .
- the anti-rotation arm 6 connected to the anti-backlash nut 5 , moves with the anti-backlash nut 5 .
- the slot in the housing described above prevents the anti-rotation arm 6 from rotating as the lead screw 4 is rotated.
- the plunger 18 is moved in an axial direction into and out of the chamber to dispense and aspirate fluids as described above.
- the above described pumping device using the anti-rotation arm, the anti-rotation slot of the housing, the anti-backlash nut with appropriate modifications to the lead screw pitch, plunger diameter and stepper motor control and other features, provides accurate and reliable aspiration and dispensing volumes.
- the self-aligning features allow the pump to be easily reconfigured to accommodate different full stroke volumes.
- the self-aligning features, together with the few number of parts, provide for substantial cost savings in the manufacture of the pumping device.
Abstract
A highly accurate pumping device for aspirating and dispensing variable volumes of fluid is presented. The pumping device comprises a housing with a slotted optical sensor, a stepper motor with a fine pitch lead screw, a coupling linking the stepper motor shaft and the lead screw, an anti-backlash nut, an anti-rotation arm linking the plunger with the anti-backlash nut, an end of travel sensor feature integrated in the arm, and a top which incorporates a chamber and a lead screw bearing. A seal, located in the top, seals against the plunger and the chamber. The plunger is attached to the anti-rotation arm and eccentrically aligned to the lead screw. The pumping device further includes one or more ports through which fluid may be introduced into or out of the chamber. The pumping device may be easily changed to accommodate different full-scale volume requirements due to the self-aligning features.
Description
- Many types of pumps are used to aspirate and dispense fluids. Many applications require accurately dispensing small volumes of fluid. Pumps typically are comprised of many pieces with many stringent manufacturing requirements necessary for such accurate aspirating and dispensing.
- There is a need for a pump which is simple to manufacture and is able to provide accurate aspiration and dispensing of a wide range of volumes.
- A highly accurate pumping device for aspirating and dispensing fluids is presented. The pumping device is comprised of a stepper motor, a lead screw, a coupler linking the stepper motor shaft to the lead screw, an anti-backlash nut coupled to the lead screw, an anti-rotation arm coupled to the anti-backlash nut, a plunger coupled to the anti-rotation arm, a top section, an end cap and a housing with a slot for the anti-rotation arm and mounts for an end-of-travel sensor. The top section is comprised of a bearing for locating one end of the lead screw, a pumping chamber, one or more ports and a recessed area for a seal, which seals against the plunger and the sides of the recessed area. The end cap is located such as to retain the seal in the recessed area of the top section. Activation of the stepper motor causes the plunger to move axially into or out of the pumping chamber thus dispensing or aspirating fluid. Accurate aspiration and dispensing of fluids is accomplished with the use of the anti-rotation slot, the anti-backlash nut and by adjusting several factors such as the pitch of the lead screw, the diameter of the plunger and the actuation of the stepper motor. Exchanging a minimal number of parts allows the pump to aspirate and dispense different volumes of fluids. The self-aligning features of the pump allow the pump to be easily reconfigured.
-
FIG. 1A is a front perspective view of the pumping device. -
FIG. 1B is a rear perspective view of the pumping device. -
FIG. 2 is a cross sectional view of the pumping device ofFIG. 1A . -
FIG. 3A is a perspective view of a first top. -
FIG. 3B is a cross sectional side view of a first top inFIG. 3A showing a bearing, a seal and the end cap. -
FIG. 3C is a cross sectional view of a second top without the bearing, seal and end cap. -
FIG. 4 is a perspective view of the end cap. -
FIG. 5A is a perspective view of the housing. -
FIG. 5B is a cross sectional side view of the housing inFIG. 5A . -
FIG. 5C is a rear view of the housing inFIG. 5A . -
FIG. 6 is a perspective view of the anti-rotation arm. -
FIG. 7 is a perspective view of the anti-backlash nut, lead screw, anti-rotation arm and a first plunger assembly. -
FIG. 8A is a cross sectional view of a first plunger inFIG. 7 . -
FIG. 8B is a cross sectional view of a second plunger. -
FIG. 9 is a perspective view of the coupler. -
FIG. 10 is a perspective view of the lead screw. -
FIG. 11 is a perspective view of the lead screw, anti-backlash nut, plunger, anti-rotation arm and coupler assembly. -
FIG. 12A is a perspective view of a first seal. -
FIG. 12B is a perspective view of a second seal. -
FIG. 13 is a perspective view of the stepper motor. -
FIG. 14 is a perspective view of the lead screw, anti-backlash nut, anti-rotation arm, plunger, coupler and stepper motor assembly. - Shown in
FIGS. 1A and 1B is a highly accurate pumping device comprised of a firsttop section 1, anend cap 17, ahousing 7, afirst plunger 18, ananti-rotation arm 6, asensor 8 and astepper motor 10. Also shown inFIG. 1A are aninlet port 12 and anoutlet port 13. The number and location of the ports can vary. Anadjustment knob 45 is attached to themotor 10 to manually adjust the position of thefirst plunger 18. - As shown in
FIG. 2 thecoupler 9 connects theshaft 11 of thestepper motor 10 to thelead screw 4. Thelead screw 4 is located in afirst top section 1 by means of abearing 3. Theanti-rotation arm 6 is connected to theanti-backlash nut 5, which moves axially along thelead screw 4 when thestepper motor 10 is activated. Afirst plunger 18 is attached to thearm 6 by means of ascrew 29. Afirst seal 14 is retained in a firsttop section 1 by means of anend cap 17. Afirst plunger 18 is moved axially through afirst seal 14 when thestepper motor 10 is activated. Asensor 8 located on thehousing 7 is used for determining position of afirst plunger 18. The number and location of thesensor 8 on the housing may vary. Theadjustment knob 45 is attached on themotor 10 distally from thehousing 7. -
FIG. 3A shows a firsttop section 1 with a plurality ofholes 38 used to attach thetop section 1 to the housing as described below. -
FIG. 3B shows the configuration of a firsttop section 1. Thebearing 3, which locates the lead screw as described above, is located in ahole 34. Afirst seal 14 is located in a recessedarea 16. Theend cap 17 is attached to thetop section 1 such that its central hole, as described below, is axially aligned with afirst chamber 31 and attached to thetop section 1. Theend cap 17 retains theseal 14 in the recessedarea 16. Anoutlet port 13 is located at the top surface of thetop section 1 and is axially aligned with afirst chamber 31. The chamber is substantially cylindrical in shape. Aconical section 33 of afirst chamber 31 assists in removal of air bubbles when liquid is dispensed. Theinlet port 12 is located above theseal 14 perpendicular to thechamber 31 to assist in removal of air bubbles from around theseal 14 when liquid is aspirated. A recessedarea 23 is used to axially align thetop section 1 with the housing as described below. - A second
top section 2 is shown inFIG. 3C . Asecond chamber 32 allows for a different volume to be aspirated or dispensed. The chamber is substantially cylindrical in shape. A second seal, as described below, is located in asecond hole 44. Theoutlet port 13 is axially aligned with thesecond chamber 32. Aconical section 42 of thesecond chamber 32 assists in removal of air bubbles when liquid is dispensed. Ahole 34 is used to locate a bearing as described above. A recessedarea 23 is used to axially align the secondtop section 2 with the housing as described below. Theinlet port 12 is located perpendicular to thechamber 31 to assist in removal of air bubbles from around the seal when liquid is aspirated as described above. - The
end cap 17, shown inFIG. 4 , is comprised of acentral hole 41 and a plurality ofholes 40 used to attach theend cap 17 to the top section. Thecentral hole 41 is axially aligned with the chamber in the top section as described above. -
FIG. 5A shows thehousing 7 with a plurality ofholes 39 which are used to attach thehousing 7 to the top section as described above. Theboss 22 is used to axially align thehousing 7 with the top section as described above. Aslot 25 is provided for movement of the end of travel protrusion of the anti-rotational arm as described below. Asecond slot 24 prevents the anti-rotation arm from rotating as described below. A plurality ofholes 43 is used to attach the housing to the stepper motor as described below. -
FIG. 5B shows thehousing 7, which includes aboss 22 used to axially align thehousing 7 with the top section as described above. A recessedarea 21 is used to axially align thehousing 7 with the stepper motor as described below. - A rear view of the
housing 7 is shown inFIG. 5C . Mounting supports 26 and aslot 30 allow for the attachment of the sensor as described above. - The
anti-rotation arm 6 is shown inFIG. 6 . It contains aprotrusion 37 which is used with the sensor to indicate position of the plunger as described above. A hole 46 is used to attach the plunger as described below to theanti-rotation arm 6. -
FIG. 7 shows the assembly of thelead screw 4, theanti-backlash nut 5, theanti-rotation arm 6 and afirst plunger 18. -
FIG. 8A shows afirst plunger 18 with a threadedhole 35 used to attach the plunger to the anti-rotational arm as described above. The plunger may be attached to the anti-rotation arm by means other than screws. -
FIG. 8B shows a second plunger 19 with a diameter different from that of the first plunger. A threadedhole 35 is used to attach the plunger to the anti-rotation arm as described above. The plunger may be attached to the anti-rotation arm by means other than screws. -
FIG. 9 shows one version of acoupler 9 that is used to connect the shaft of the stepper motor to the lead screw as described above. Other configurations of the coupler are possible. -
FIG. 10 shows thelead screw 4. Theproximal end 28 is connected to the coupler as described above. Thedistal end 27 is inserted into the bearing as described above. Theproximal end 28 and thedistal end 27 may be of same or different diameters. -
FIG. 11 shows an assembly consisting of thelead screw 4, theanti-backlash nut 5, theanti-rotation arm 6, afirst plunger 18 and thecoupler 9. The anti-backlash nut is self-adjusting to take out any backlash between the lead screw and the motor. - A
first seal 14 is shown inFIG. 12A . The seal is a u-cup shape with an internal diameter sized for the first plunger. The outer diameter seals against the recessed area of the top section as described above. - A
second seal 15 is shown inFIG. 12B . The seal is a u-cup shape with an internal diameter sized for the second plunger. The outer diameter seals against the recessed area of the top section as described above. - The
stepper motor 10 is shown inFIG. 13 . Aboss 20 on the motor is used to axially align the motor to the housing as described above. Awiring connector 36 provides for power to the motor. -
FIG. 14 shows the arrangement between thestepper motor 10, thecoupler 9, thelead screw 4, theanti-backlash nut 5, theanti-rotation arm 6 and afirst plunger 18. Thestepper motor 10 turns thecoupler 9 which in turn rotates thelead screw 4. Theanti-backlash nut 5 travels axially along thelead screw 4. Theanti-rotation arm 6, connected to theanti-backlash nut 5, moves with theanti-backlash nut 5. The slot in the housing described above prevents theanti-rotation arm 6 from rotating as thelead screw 4 is rotated. Thus, theplunger 18 is moved in an axial direction into and out of the chamber to dispense and aspirate fluids as described above. - The above described pumping device, using the anti-rotation arm, the anti-rotation slot of the housing, the anti-backlash nut with appropriate modifications to the lead screw pitch, plunger diameter and stepper motor control and other features, provides accurate and reliable aspiration and dispensing volumes. The self-aligning features allow the pump to be easily reconfigured to accommodate different full stroke volumes. The self-aligning features, together with the few number of parts, provide for substantial cost savings in the manufacture of the pumping device.
- Having described preferred embodiments of the invention, it will become apparent to those of reasonable skill in the art that other embodiments incorporating the above described features may also be developed. Accordingly, it is submitted that the present invention not be limited to the described embodiments but rather by the scope and spirit of the appended claims.
Claims (9)
1. A highly accurate pumping device comprising:
a housing including an integral anti-rotation groove and mounting location for a slotted optical sensor;
a first top removably coupled to said housing;
a first chamber within a portion of said first top, said first chamber having a cone shape at one end;
a first plunger displaceable within a portion of said first chamber, which, in combination with said first chamber, is adapted for aspirating and dispensing;
ports within said first top, said ports allowing for the introduction of liquid into or out of said first chamber;
a coupler linking the lead screw and stepper motor shaft;
a stepper motor attached to said housing, which turns said lead screw for the purpose of moving said first plunger into or out of said first chamber;
2. The pumping device of claim 1 further comprising an anti-rotation arm removably coupled to an anti-backlash nut, the anti-rotation arm having an end of travel protrusion that interacts with a slotted optical sensor.
3. The pumping device of claim 1 wherein said first plunger is removably coupled to said anti-rotation arm.
4. The pumping device of claim 1 comprising a first seal disposed around said first plunger and against a surface of a recessed area of said first top.
5. The pumping device of claim 1 wherein one port is located proximally to said first seal and oriented with its axis perpendicular to the axis of said first chamber to allow incoming fluid to clear away residual air bubbles from said first seal.
6. The pumping device of claim 1 wherein one port is located distally from said first seal and axially aligned with said first chamber.
7. The pumping device of claim 1 comprising an end cap disposed to restrain said first seal in said first top.
8. The pumping device of claim 1 comprising a bearing disposed in a hole in said first top, said bearing axially aligned with said lead screw, through which one end of said lead screw protrudes.
9. The pumping device of claim 1 further comprising:
a second plunger having a different size than said first plunger;
a second top with a second chamber having a different size than said first chamber;
a second seal having a different size than said first seal, said second seal disposed in recessed area in said second top and restrained by an end cap; said second top, said second plunger and said second seal adapted to aspirate or dispense a second volume of liquid.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/760,765 US20050158191A1 (en) | 2004-01-21 | 2004-01-21 | Highly accurate pumping device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/760,765 US20050158191A1 (en) | 2004-01-21 | 2004-01-21 | Highly accurate pumping device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050158191A1 true US20050158191A1 (en) | 2005-07-21 |
Family
ID=34750063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/760,765 Abandoned US20050158191A1 (en) | 2004-01-21 | 2004-01-21 | Highly accurate pumping device |
Country Status (1)
Country | Link |
---|---|
US (1) | US20050158191A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080152515A1 (en) * | 2006-12-21 | 2008-06-26 | Karg Jeffrey A | Reciprocating antirotation pump |
WO2011018244A1 (en) * | 2009-08-13 | 2011-02-17 | Berlin Heart Gmbh | Pump device having a drive device for the piston of a fluid pump |
WO2012140346A1 (en) * | 2011-04-12 | 2012-10-18 | Pulssar Technologies | Piston pump having flat guidance |
WO2012177331A1 (en) * | 2011-06-21 | 2012-12-27 | Agr Subsea, As | Direct drive fluid pump for subsea mudlift pump drilling systems |
US20140271264A1 (en) * | 2013-03-15 | 2014-09-18 | Anthony Florindi | Piston pump drive train anti-backlash |
CN107642472A (en) * | 2016-07-20 | 2018-01-30 | 北京普源精电科技有限公司 | Infusion pump and its self-test repositioning method with self-protection function |
GB2555816A (en) * | 2016-11-10 | 2018-05-16 | Natural Environment Res Council | Analyser |
Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1695305A (en) * | 1926-10-20 | 1928-12-18 | French Oil Mill Machinery | Ram |
US3036529A (en) * | 1960-04-07 | 1962-05-29 | Farley J Archer | Pump |
US3155041A (en) * | 1963-05-16 | 1964-11-03 | Mansfield Green Inc | Pressure apparatus |
US3447479A (en) * | 1967-06-02 | 1969-06-03 | Pall Corp | Syringe pump |
US3556679A (en) * | 1968-08-08 | 1971-01-19 | Continental Oil Co | Metering pump |
US4089624A (en) * | 1976-06-04 | 1978-05-16 | Becton, Dickinson And Company | Controlled pumping system |
US4276003A (en) * | 1977-03-04 | 1981-06-30 | California Institute Of Technology | Reciprocating piston pump system with screw drive |
US4566868A (en) * | 1980-09-17 | 1986-01-28 | Geotechnical Digital Systems Limited | Pressure source |
US4715791A (en) * | 1985-08-21 | 1987-12-29 | Tetra Pak International Ab | Metering pump |
US4793776A (en) * | 1985-09-06 | 1988-12-27 | Research Corporation | Pump for oscillating a fluid in vivo |
US4799866A (en) * | 1984-08-03 | 1989-01-24 | Fresenius Ag | Spray pump with a motor driven drive rod |
US4922900A (en) * | 1988-05-19 | 1990-05-08 | Dragerwerk Aktiengesellschaft | Pumping arrangement for supplying a ventilating apparatus with breathing gas |
US4941808A (en) * | 1988-06-29 | 1990-07-17 | Humayun Qureshi | Multi-mode differential fluid displacement pump |
US5201851A (en) * | 1989-04-18 | 1993-04-13 | Pharacia Biosensor Ab | Pump and metering apparatus |
US5312233A (en) * | 1992-02-25 | 1994-05-17 | Ivek Corporation | Linear liquid dispensing pump for dispensing liquid in nanoliter volumes |
US5540562A (en) * | 1994-04-28 | 1996-07-30 | Ashirus Technologies, Inc. | Single-piston, multi-mode fluid displacement pump |
US5567122A (en) * | 1994-10-13 | 1996-10-22 | Barry J. Walter | Cylinder pump having controllable piston/drive detachment |
US6234771B1 (en) * | 1998-06-02 | 2001-05-22 | Bayer Corporation | Precision pumping device |
US20030090823A1 (en) * | 2000-12-29 | 2003-05-15 | Engel Thomas W. | Actuator mechanism for tuning an optical device |
-
2004
- 2004-01-21 US US10/760,765 patent/US20050158191A1/en not_active Abandoned
Patent Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1695305A (en) * | 1926-10-20 | 1928-12-18 | French Oil Mill Machinery | Ram |
US3036529A (en) * | 1960-04-07 | 1962-05-29 | Farley J Archer | Pump |
US3155041A (en) * | 1963-05-16 | 1964-11-03 | Mansfield Green Inc | Pressure apparatus |
US3447479A (en) * | 1967-06-02 | 1969-06-03 | Pall Corp | Syringe pump |
US3556679A (en) * | 1968-08-08 | 1971-01-19 | Continental Oil Co | Metering pump |
US4089624A (en) * | 1976-06-04 | 1978-05-16 | Becton, Dickinson And Company | Controlled pumping system |
US4276003A (en) * | 1977-03-04 | 1981-06-30 | California Institute Of Technology | Reciprocating piston pump system with screw drive |
US4566868A (en) * | 1980-09-17 | 1986-01-28 | Geotechnical Digital Systems Limited | Pressure source |
US4799866A (en) * | 1984-08-03 | 1989-01-24 | Fresenius Ag | Spray pump with a motor driven drive rod |
US4715791A (en) * | 1985-08-21 | 1987-12-29 | Tetra Pak International Ab | Metering pump |
US4793776A (en) * | 1985-09-06 | 1988-12-27 | Research Corporation | Pump for oscillating a fluid in vivo |
US4922900A (en) * | 1988-05-19 | 1990-05-08 | Dragerwerk Aktiengesellschaft | Pumping arrangement for supplying a ventilating apparatus with breathing gas |
US4941808A (en) * | 1988-06-29 | 1990-07-17 | Humayun Qureshi | Multi-mode differential fluid displacement pump |
US5201851A (en) * | 1989-04-18 | 1993-04-13 | Pharacia Biosensor Ab | Pump and metering apparatus |
US5312233A (en) * | 1992-02-25 | 1994-05-17 | Ivek Corporation | Linear liquid dispensing pump for dispensing liquid in nanoliter volumes |
US5540562A (en) * | 1994-04-28 | 1996-07-30 | Ashirus Technologies, Inc. | Single-piston, multi-mode fluid displacement pump |
US5567122A (en) * | 1994-10-13 | 1996-10-22 | Barry J. Walter | Cylinder pump having controllable piston/drive detachment |
US6234771B1 (en) * | 1998-06-02 | 2001-05-22 | Bayer Corporation | Precision pumping device |
US20030090823A1 (en) * | 2000-12-29 | 2003-05-15 | Engel Thomas W. | Actuator mechanism for tuning an optical device |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080152515A1 (en) * | 2006-12-21 | 2008-06-26 | Karg Jeffrey A | Reciprocating antirotation pump |
WO2011018244A1 (en) * | 2009-08-13 | 2011-02-17 | Berlin Heart Gmbh | Pump device having a drive device for the piston of a fluid pump |
EP2295798A1 (en) * | 2009-08-13 | 2011-03-16 | Berlin Heart GmbH | Drive device for the piston of a fluid pump |
JP2014514497A (en) * | 2011-04-12 | 2014-06-19 | プルサール テクノロジーズ | Piston pump with flat guide |
FR2974155A1 (en) * | 2011-04-12 | 2012-10-19 | Pulssar Technologies | PISTON PUMP COMPRISING A FLAT GUIDE. |
CN103547801A (en) * | 2011-04-12 | 2014-01-29 | 布尔萨技术公司 | Piston pump having flat guidance |
US20140033914A1 (en) * | 2011-04-12 | 2014-02-06 | Pulssar Technologies | Piston pump comprising flat guiding |
WO2012140346A1 (en) * | 2011-04-12 | 2012-10-18 | Pulssar Technologies | Piston pump having flat guidance |
US9732738B2 (en) * | 2011-04-12 | 2017-08-15 | Pulssar Technologies | Piston pump comprising flat guiding |
CN110242554A (en) * | 2011-04-12 | 2019-09-17 | 天康贸易股份公司 | Piston pump with flat guiding device |
WO2012177331A1 (en) * | 2011-06-21 | 2012-12-27 | Agr Subsea, As | Direct drive fluid pump for subsea mudlift pump drilling systems |
US9322230B2 (en) | 2011-06-21 | 2016-04-26 | Agr Subsea, As | Direct drive fluid pump for subsea mudlift pump drilling systems |
US20140271264A1 (en) * | 2013-03-15 | 2014-09-18 | Anthony Florindi | Piston pump drive train anti-backlash |
WO2014149373A1 (en) * | 2013-03-15 | 2014-09-25 | Idex Health And Science Llc | Piston pump drive train anti-backlash |
CN107642472A (en) * | 2016-07-20 | 2018-01-30 | 北京普源精电科技有限公司 | Infusion pump and its self-test repositioning method with self-protection function |
GB2555816A (en) * | 2016-11-10 | 2018-05-16 | Natural Environment Res Council | Analyser |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5246354A (en) | Valveless metering pump with reciprocating, rotating piston | |
US5564606A (en) | Precision dispensing pump for viscous materials | |
US7780098B2 (en) | Fan spray pattern indexing nozzle for a trigger sprayer | |
US20120165783A1 (en) | Device for at least one of injection or aspiration | |
US11370596B1 (en) | Micro-volume dispense pump systems and methods | |
EP1481735A3 (en) | Twirling dip tube | |
US20050158191A1 (en) | Highly accurate pumping device | |
EP1920693A3 (en) | Piston pump stroke adjustment mechanism | |
US6253972B1 (en) | Liquid dispensing valve | |
US7325478B2 (en) | High pressure low volume pump | |
US6234771B1 (en) | Precision pumping device | |
US20020016572A1 (en) | Barrel stabilizer for syringe piston | |
CA3165085A1 (en) | Dynamic broad volumetric range pipette | |
EP1213479A1 (en) | High pressure low volume pump | |
AU2002219963A1 (en) | High pressure low volume pump | |
JP5419008B2 (en) | Pump device | |
CA2102625C (en) | Method and apparatus for calibrating a multiple port pump | |
US7919061B2 (en) | Pipette device system and micropipette thereof | |
US6092995A (en) | High precision pump for medical and chemical analyzers | |
WO1993015316A1 (en) | Valveless metering pump with reciprocating, rotating piston | |
KR20210015310A (en) | Device for discharging liquid | |
JPH07227562A (en) | Fixed quantity liquid discharging device | |
JPH08146012A (en) | Electromotive pipette device | |
US11306716B2 (en) | Pump | |
JP2022524256A (en) | Piezoelectric micropipette |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |