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Class Information
Number: 417/271
Name: Pumps > Three or more cylinders arranged in parallel, radial, or conical relationship with rotary transmission axis > Motor driven
Description: Apparatus in which the pump is driven by a motor.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8608454 Combined pump housing for several rated quantities Dec. 17, 2013
8523536 Axial piston pump, and power transmission device with axial piston pump Sep. 3, 2013
8517695 Variable displacement swash plate type compressor Aug. 27, 2013
8475141 Pump assembly for high pressure cleaners Jul. 2, 2013
8459962 Variable displacement swash plate type compressor Jun. 11, 2013
8435013 Reciprocating compressor and oxygen concentrator May. 7, 2013
8342816 Engine-driven hydraulic pump Jan. 1, 2013
8333572 Pump Dec. 18, 2012
8322999 Hydrostatic axial piston machine Dec. 4, 2012
8267672 High pressure pump Sep. 18, 2012
8262368 Hydraulic piston machine Sep. 11, 2012
8235681 Opposing swash plate piston pump/motor Aug. 7, 2012
8215924 Oil separating structure of variable displacement compressor Jul. 10, 2012
8206130 Hydraulic motor having radial cylinders capable of high speed rotation Jun. 26, 2012
8118566 Piston compressor with second intake Feb. 21, 2012
8087904 Hybrid hydraulic-electric RAM pumping unit with downstroke energy recovery Jan. 3, 2012
8011897 Cam driven piston compressor Sep. 6, 2011
7997879 Axial piston machine of swash-plate construction with a bearing arrangement of the cylinder block on a supporting journal Aug. 16, 2011
7988428 Axial piston machine Aug. 2, 2011
7967574 Variable pump or hydraulic motor Jun. 28, 2011
7950904 Compressor May. 31, 2011
7927082 Highly efficient durable fluid pump and method Apr. 19, 2011
7887304 Method and structure of preventing water from leakage for the pressurized pump of diaphragm type Feb. 15, 2011
7821215 Pump controller system and method Oct. 26, 2010
7802440 Compression system and air conditioning system Sep. 28, 2010
7736132 Compressors and methods for use Jun. 15, 2010
7661935 High pressure pump Feb. 16, 2010
7585158 Piston engine comprising a pulsation-reducing device Sep. 8, 2009
7448858 Pump aggregate Nov. 11, 2008
7377754 Compressor May. 27, 2008
7047867 Oscillating device for adjusting the displacement of a fluid pump May. 23, 2006
6863505 Wind driven high pressure water pump Mar. 8, 2005
6776589 Reciprocating piston compressor having improved noise attenuation Aug. 17, 2004
6565329 Electric type swash plate compressor May. 20, 2003
6554583 Swash plate compressor with reciprocal guide assembly Apr. 29, 2003
6524084 Motor pump unit Feb. 25, 2003
6499962 Bearing arrangement for a swash plate pump Dec. 31, 2002
6481985 Maximizing the load torque in a swash plate compressor Nov. 19, 2002
6092455 Hydraulic pressure transformer Jul. 25, 2000
6078118 Electric motor-pump assembly Jun. 20, 2000
6056515 Hydrocleaning machine with pump mounting closure lid May. 2, 2000
5957667 Oilless compressor with a pressurizable crankcase and motor containment vessel Sep. 28, 1999
5877577 Electric hydraulic hybrid motor, control device and control method for the same motor Mar. 2, 1999
5755562 Thrust reduction plate for an axial piston fuel pump May. 26, 1998
5741124 Double insulated electrically driven water pump Apr. 21, 1998
5601417 Hydraulic pump with ball bearing pistons Feb. 11, 1997
5591013 Fluid pressure generating device Jan. 7, 1997
5511956 High pressure fuel pump for internal combustion engine Apr. 30, 1996
5450987 Pumping system with failure responsive discharge valve Sep. 19, 1995
5380168 Axial multi-piston compressor having rotary valve for allowing residual part of compressed fluid to escape Jan. 10, 1995

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