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Class Information
Number: 417/390
Name: Pumps > Motor driven > Fluid motor > With motive fluid generator > Fluid pump
Description: Apparatus in which the motive fluid generating apparatus comprises a fluid pump (e.g., centrifugal, expansible chamber, axial flow, etc.).










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8573309 Liquid rod pump and method Nov. 5, 2013
8568112 Reciprocating piston pump with air valve, detent and poppets Oct. 29, 2013
8562308 Regenerative hydraulic lift system Oct. 22, 2013
8517700 Submersible pump Aug. 27, 2013
8491278 Auxiliary braking device for wellhead having progressive cavity pump Jul. 23, 2013
8382451 Pump apparatus Feb. 26, 2013
8382446 Mini-surge cycling method for pumping liquid from a borehole to remove material in contact with the liquid Feb. 26, 2013
8366413 Low rate hydraulic artificial lift Feb. 5, 2013
8353684 Phase change compressor Jan. 15, 2013
8341955 Hydraulic drive and control system for pumps using a charge pump Jan. 1, 2013
8342827 Hermetic compressor and refrigeration cycle device having the same Jan. 1, 2013
8322435 Pressure driven system Dec. 4, 2012
8277653 Power recovery chamber Oct. 2, 2012
8147217 Pump device Apr. 3, 2012
8083499 Regenerative hydraulic lift system Dec. 27, 2011
8057197 Transparent valve body for dense phase pump Nov. 15, 2011
8011901 Discharge pressure actuated pump Sep. 6, 2011
7967578 Hydraulic gravity ram pump Jun. 28, 2011
7866287 Pump system and decoupler for supplying pressurized hydraulic fluid to a hydraulically actuated valvetrain Jan. 11, 2011
7806665 Auxiliary braking device for wellhead having progressive cavity pump Oct. 5, 2010
7775776 Method and apparatus to pump liquids from a well Aug. 17, 2010
7735563 Pressure driven pumping system Jun. 15, 2010
7726950 Fluid supply unit having an integral pressure generator and pressure booster Jun. 1, 2010
7604064 Multi-stage, multi-phase unitized linear liquid entrained-phase transfer apparatus Oct. 20, 2009
7600982 Compact helical compressor for mobile use in a vehicle Oct. 13, 2009
7566208 Non-electric drive mechanism for a submersible pump Jul. 28, 2009
7566205 Reciprocating pump and check valve Jul. 28, 2009
7530799 Long-stroke deep-well pumping unit May. 12, 2009
7458786 Oil well pumping unit and method therefor Dec. 2, 2008
7381035 Piston pump with check shaft Jun. 3, 2008
7311502 Method for using a hydraulic amplifier pump in ultrahigh pressure liquid chromatography Dec. 25, 2007
7204679 Flow control system Apr. 17, 2007
7177151 Cooling devices and systems Feb. 13, 2007
7134849 Molded disposable pneumatic pump Nov. 14, 2006
7134499 Rotary and reciprocal well pump system Nov. 14, 2006
7114929 Reciprocating pump and check valve Oct. 3, 2006
6981850 Apparatus and method for producing a pressurized vapor stream Jan. 3, 2006
6846166 Reciprocating diaphragm pump with degassing valves Jan. 25, 2005
6841076 Method and device for desalting water Jan. 11, 2005
6712587 Hydraulic amplifier pump for use in ultrahigh pressure liquid chromatography Mar. 30, 2004
6699019 Reciprocating windmill pumping system Mar. 2, 2004
6672841 Pumping and metering device Jan. 6, 2004
6644937 Water powered pumping system with fluid link Nov. 11, 2003
6619930 Method and apparatus for pressurizing gas Sep. 16, 2003
6554582 High pressure pump with improved hub Apr. 29, 2003
6551076 Fuel/hydraulic engine system Apr. 22, 2003
6322333 Device for enhancing fluid flow Nov. 27, 2001
6264437 High pressure pump for all liquids Jul. 24, 2001
6183217 Pilot control valve for controlling a reciprocating pump Feb. 6, 2001
6179570 Variable pump control for hydraulic fan drive Jan. 30, 2001

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