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Class Information
Number: 417/269
Name: Pumps > Three or more cylinders arranged in parallel, radial, or conical relationship with rotary transmission axis
Description: Apparatus in which the pump comprises three or more cylinders, each cylinder being provided with a relatively reciprocating piston (include diaphragm) to thereby form a plurality of pumping chambers, the cylinders or a transmission element in common operative engagement with said cylinders or pistons being adapted to rotate about a fixed axis; said cylinders being physically arranged in a manner such that their longitudinal axes either (1) intersect at a common point or (2) extend parallel to said axis of rotation.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7611337 |
Hydraulic pump |
Nov. 3, 2009 |
| 7607897 |
Reciprocating compressor |
Oct. 27, 2009 |
| 7607900 |
Multi-cylinder reciprocating compressor |
Oct. 27, 2009 |
| 7594802 |
Large angle sliding valve plate pump/motor |
Sep. 29, 2009 |
| 7566207 |
Dual pump transmission |
Jul. 28, 2009 |
| 7553133 |
Circumferential piston compressor/pump/engine (CPC/CPP/CPE); circumferential piston machines |
Jun. 30, 2009 |
| 7547198 |
Double-headed piston type compressor |
Jun. 16, 2009 |
| 7540720 |
Heat-insulating mechanism for compressor |
Jun. 2, 2009 |
| 7527595 |
Pump provided with exhaust valve device and hemodynamometer incorporating the same |
May. 5, 2009 |
| 7520210 |
Oil separator for a fluid displacement apparatus |
Apr. 21, 2009 |
| 7500424 |
Hydraulic machine having pressure equalization |
Mar. 10, 2009 |
| 7494328 |
NVH and gas pulsation reduction in AC compressor |
Feb. 24, 2009 |
| 7470116 |
Axial piston machine |
Dec. 30, 2008 |
| 7458785 |
Compressor with lubrication structure |
Dec. 2, 2008 |
| 7438029 |
Piston waveform shaping |
Oct. 21, 2008 |
| 7413421 |
Multi-cylinder reciprocating compressor |
Aug. 19, 2008 |
| 7402027 |
Rotating group of a hydraulic machine |
Jul. 22, 2008 |
| 7399169 |
Compressor |
Jul. 15, 2008 |
| 7390178 |
Compressor |
Jun. 24, 2008 |
| 7387501 |
Control valve for variable displacement compressor |
Jun. 17, 2008 |
| 7384248 |
Fuel metering pump |
Jun. 10, 2008 |
| 7380490 |
Housing for rotary hydraulic machines |
Jun. 3, 2008 |
| 7377754 |
Compressor |
May. 27, 2008 |
| 7371055 |
Tandem pump unit |
May. 13, 2008 |
| 7364409 |
Piston assembly for rotary hydraulic machines |
Apr. 29, 2008 |
| 7364408 |
Crank case shut off valve |
Apr. 29, 2008 |
| 7361000 |
Tandem pump unit |
Apr. 22, 2008 |
| 7328647 |
Hydraulic device |
Feb. 12, 2008 |
| 7320576 |
Clutchless variable displacement refrigerant compressor with mechanism for reducing displacement work at increased driven speed during non-operation of refrigerating system including the compr |
Jan. 22, 2008 |
| 7300260 |
Special fluids for use in a hydrostatic transmission |
Nov. 27, 2007 |
| 7281905 |
Piston type compressor |
Oct. 16, 2007 |
| 7281519 |
Set of piston type fuel pumps for internal combustion engines with direct fuel injection |
Oct. 16, 2007 |
| 7273356 |
Control valve device for variable capacity type swash plate compressor |
Sep. 25, 2007 |
| 7263829 |
Pump |
Sep. 4, 2007 |
| 7258531 |
Axial piston compressor |
Aug. 21, 2007 |
| 7241116 |
Method of adjusting rotary machine |
Jul. 10, 2007 |
| 7232294 |
Compressor having a discharge valve mechanism including a valve retainer having a specially-designed curved surface |
Jun. 19, 2007 |
| 7232293 |
Manual hydraulic pump |
Jun. 19, 2007 |
| 7229256 |
Dual pump transmission |
Jun. 12, 2007 |
| 7214315 |
Pressure exchange apparatus with integral pump |
May. 8, 2007 |
| 7207785 |
Vane pump wear sensor for predicted failure mode |
Apr. 24, 2007 |
| 7201566 |
Reciprocating-piston machine with a joint arrangement |
Apr. 10, 2007 |
| 7195464 |
Hydraulic axial piston pump |
Mar. 27, 2007 |
| 7185577 |
Tandem pump unit |
Mar. 6, 2007 |
| 7179063 |
Reciprocating-piston machine with a sliding sleeve |
Feb. 20, 2007 |
| 7174827 |
Mounting clip for thrust bearing |
Feb. 13, 2007 |
| 7175396 |
Compressor |
Feb. 13, 2007 |
| 7172393 |
Multi-cylinder compressors and methods for designing such compressors |
Feb. 6, 2007 |
| 7162948 |
Variable stroke assembly balancing |
Jan. 16, 2007 |
| 7153105 |
Compressor with swash plate housing inlet port |
Dec. 26, 2006 |
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