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Class Information
Number: 417/555.1
Name: Pumps > Expansible chamber type > Fluid serially moved to opposite side of pumping member
Description: Apparatus having a reciprocating pumping member and in which fluid is moved from one side of the pumping member to the opposite side thereof during one reciprocatory stroke direction and then moved in the direction of movement of the pumping member during the other reciprocatory stroke direction.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7617874 |
Flexible matrix composite actuator for use in subsurface wellbores |
Nov. 17, 2009 |
| 7540323 |
Well pumping system with pump rod trash cups |
Jun. 2, 2009 |
| 7410348 |
Multi-speed compressor/pump apparatus |
Aug. 12, 2008 |
| 7351044 |
Multi-stage piston type compressor |
Apr. 1, 2008 |
| 7318416 |
Liquid fuel pump |
Jan. 15, 2008 |
| 7296981 |
Pump having independently releasable ends |
Nov. 20, 2007 |
| 7168924 |
Rod pump control system including parameter estimator |
Jan. 30, 2007 |
| 7165951 |
High-pressure generating device |
Jan. 23, 2007 |
| 7063520 |
Suction valve assembly of reciprocating compressor |
Jun. 20, 2006 |
| 7048801 |
Chemical pump and method of discharging chemical solution |
May. 23, 2006 |
| 7048522 |
Fluid balanced pump |
May. 23, 2006 |
| 7001158 |
Digital fluid pump |
Feb. 21, 2006 |
| 6986651 |
Pump priming apparatus |
Jan. 17, 2006 |
| 6979184 |
Manual negative pressure pump device |
Dec. 27, 2005 |
| 6960068 |
Center valve sleeve retention system for an oscillating pump |
Nov. 1, 2005 |
| 6913450 |
Suction valve coupling structure for reciprocating compressor |
Jul. 5, 2005 |
| 6893232 |
Hand operable pump |
May. 17, 2005 |
| 6843645 |
Cooling system for a magnetic pump |
Jan. 18, 2005 |
| 6840747 |
Positive-displacement oil pump |
Jan. 11, 2005 |
| 6837694 |
Hydraulic pump unit with orifice plate for vehicle brake control system |
Jan. 4, 2005 |
| 6830441 |
Valve for downhole pump |
Dec. 14, 2004 |
| 6802701 |
Suction valve assembly of compressor |
Oct. 12, 2004 |
| 6739842 |
Pump |
May. 25, 2004 |
| 6722866 |
Pump system for delivering cryogenic liquids |
Apr. 20, 2004 |
| 6666663 |
Gas suction apparatus for a reciprocating compressor with a piston inertia valve |
Dec. 23, 2003 |
| 6652242 |
Pump |
Nov. 25, 2003 |
| RE38291 |
Plunger device and method of making and using the same thereof |
Oct. 28, 2003 |
| 6634869 |
Piston pump with piston spring-biased to filter piston |
Oct. 21, 2003 |
| 6568925 |
Abrasive liquid pump apparatus and method |
May. 27, 2003 |
| 6530761 |
Double-acting, two-stage pump |
Mar. 11, 2003 |
| 6530759 |
Reciprocating plunger pump with seal mounting support |
Mar. 11, 2003 |
| 6497560 |
High volume low pressure air pump |
Dec. 24, 2002 |
| 6497561 |
Downstroke sucker rod pump and method of use |
Dec. 24, 2002 |
| 6474963 |
Piston pump having a hollow piston |
Nov. 5, 2002 |
| 6419468 |
Reciprocating siphon suction pump |
Jul. 16, 2002 |
| 6368084 |
Downstroke sucker rod well pump |
Apr. 9, 2002 |
| 6364639 |
Pump |
Apr. 2, 2002 |
| 6273689 |
Electromagnetic pump with increased accuracy |
Aug. 14, 2001 |
| 6260736 |
Condiment pump |
Jul. 17, 2001 |
| 6220833 |
Elimination of inlet valve for ABS pump |
Apr. 24, 2001 |
| 6152706 |
Pneumatic pump and control means therefor |
Nov. 28, 2000 |
| 6129526 |
Metering pump having a tubular seal for sealing a main liquid from an auxiliary liquid |
Oct. 10, 2000 |
| 6102676 |
Pump |
Aug. 15, 2000 |
| 6071094 |
Photoresist dispense pump |
Jun. 6, 2000 |
| 6059548 |
Hand pump system for a traction device |
May. 9, 2000 |
| 6015270 |
Linear compressor or pump with integral motor |
Jan. 18, 2000 |
| 5997256 |
Dual stage, dual mode air pump |
Dec. 7, 1999 |
| 5984652 |
Single-piece piston with central bore for use in a pneumatically-activated pump |
Nov. 16, 1999 |
| 5927957 |
Plunger device and method of making and using the same thereof |
Jul. 27, 1999 |
| 5816787 |
Motion conversion rotator apparatus and method |
Oct. 6, 1998 |
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