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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:

Class Number Class Name Patents
417/270 Condition responsive fluid control 226
417/272 Continuous unidirectional fluid bias on reciprocating member 5
417/271 Motor driven 119
417/273 Radial cylinders 350


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20










 
 
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