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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 |
| 8690554 |
Diaphragm pump using duckbill and other types of valves |
Apr. 8, 2014 |
| 8684703 |
Reciprocating compressor |
Apr. 1, 2014 |
| 8668469 |
Hydraulic piston pump with reduced restriction barrel passage |
Mar. 11, 2014 |
| 8668470 |
Offset valve bore for a reciprocating pump |
Mar. 11, 2014 |
| 8662865 |
Offset valve bore in a reciprocating pump |
Mar. 4, 2014 |
| 8662864 |
Offset valve bore in a reciprocating pump |
Mar. 4, 2014 |
| 8647075 |
Control valve for a variable displacement pump |
Feb. 11, 2014 |
| 8635867 |
Hydrostatic transmission |
Jan. 28, 2014 |
| 8608454 |
Combined pump housing for several rated quantities |
Dec. 17, 2013 |
| 8596992 |
Air supply mechanism for ventricular assist system |
Dec. 3, 2013 |
| 8596994 |
Compressor |
Dec. 3, 2013 |
| 8562309 |
Piston compressor |
Oct. 22, 2013 |
| 8545195 |
Hydrogen generator with pump |
Oct. 1, 2013 |
| 8523536 |
Axial piston pump, and power transmission device with axial piston pump |
Sep. 3, 2013 |
| 8511216 |
Hydraulic actuator unit |
Aug. 20, 2013 |
| 8485794 |
Reciprocating compressor with rotary valve |
Jul. 16, 2013 |
| 8475141 |
Pump assembly for high pressure cleaners |
Jul. 2, 2013 |
| 8469677 |
Check valve pump with electric bypass valve |
Jun. 25, 2013 |
| 8459962 |
Variable displacement swash plate type compressor |
Jun. 11, 2013 |
| 8449267 |
Pump assembly and fluid metering unit |
May. 28, 2013 |
| 8435013 |
Reciprocating compressor and oxygen concentrator |
May. 7, 2013 |
| 8419940 |
Combined axial piston liquid pump and energy recovery pressure exchanger |
Apr. 16, 2013 |
| 8419382 |
Piston compressor |
Apr. 16, 2013 |
| 8419381 |
Tandem piston pump |
Apr. 16, 2013 |
| 8393878 |
Structure of preventing water from leakage for the pressurized pump of diaphragm type |
Mar. 12, 2013 |
| 8382458 |
High-pressure fuel pump |
Feb. 26, 2013 |
| 8366407 |
Device for reducing pulsation in a variable displacement compressor |
Feb. 5, 2013 |
| 8353680 |
Air conditioning compressor |
Jan. 15, 2013 |
| 8342816 |
Engine-driven hydraulic pump |
Jan. 1, 2013 |
| 8333571 |
Pump having pulsation-reducing engagement surface |
Dec. 18, 2012 |
| 8322999 |
Hydrostatic axial piston machine |
Dec. 4, 2012 |
| 8313310 |
Variable displacement swash plate compressor |
Nov. 20, 2012 |
| 8303263 |
Swash plate type compressor |
Nov. 6, 2012 |
| 8272315 |
Dual pump |
Sep. 25, 2012 |
| 8267672 |
High pressure pump |
Sep. 18, 2012 |
| 8262368 |
Hydraulic piston machine |
Sep. 11, 2012 |
| 8251673 |
Displacement control valve of a variable displacement compressor |
Aug. 28, 2012 |
| 8246323 |
Programmable logic controlled liquid pressurization device incorporating low energy consumption mechanisms for the utilization of solar energy |
Aug. 21, 2012 |
| 8241012 |
Structure for mounting a filter in a compressor |
Aug. 14, 2012 |
| 8240513 |
Fluid dispenser with nested displacement members |
Aug. 14, 2012 |
| 8235680 |
Hydraulic motor having radial cylinders and continuous variable displacement |
Aug. 7, 2012 |
| 8235681 |
Opposing swash plate piston pump/motor |
Aug. 7, 2012 |
| 8231359 |
Pump unit comprising a main pump and a charge pump with a variable pump capacity |
Jul. 31, 2012 |
| 8215924 |
Oil separating structure of variable displacement compressor |
Jul. 10, 2012 |
| 8210253 |
Oil well pump |
Jul. 3, 2012 |
| 8202058 |
Variable displacement piston machine with a sensor |
Jun. 19, 2012 |
| 8182239 |
Control valve, and control valve for variable displacement compressor using the control valve |
May. 22, 2012 |
| 8167580 |
Axial piston machine with hydrostatic support of the holding-down device |
May. 1, 2012 |
| 8152498 |
Peristaltic pump with removable tube |
Apr. 10, 2012 |
| 8152483 |
Variable capacity compressor |
Apr. 10, 2012 |
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