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Class Information
Number: 417/571
Name: Pumps > Expansible chamber type > Having pumping chamber pressure responsive distributor > Distributor positioned opposite pumping member end face > Inlet and discharge distributors
Description: Apparatus in which an inlet valve and a discharge valve are positioned in a wall opposite the end face of said pumping member.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8690554 Diaphragm pump using duckbill and other types of valves Apr. 8, 2014
8622315 Fluid injector having a reed valve Jan. 7, 2014
8579606 Fluid transportation device Nov. 12, 2013
8568116 Compressor having a u-shaped discharge hole and a u-shaped discharge valve Oct. 29, 2013
8469681 Double-diaphragm pumps Jun. 25, 2013
8408886 High pressure plunger pump Apr. 2, 2013
8398385 Refrigerant compressor Mar. 19, 2013
8348644 High pressure fuel injector supply pump Jan. 8, 2013
8342824 Piston compressor, particularly refrigerant compressor Jan. 1, 2013
8282368 Check valve Oct. 9, 2012
8226386 Deep force pump for oil wells Jul. 24, 2012
8221100 High pressure water pump valve and seal structure Jul. 17, 2012
8206130 Hydraulic motor having radial cylinders capable of high speed rotation Jun. 26, 2012
8206137 Cylinder apparatus, compressor and manufacturing method of cylinder apparatus Jun. 26, 2012
8197240 Compressor having improved valve plate Jun. 12, 2012
8186978 Pump with linear actuator May. 29, 2012
8157549 Multi-channel fluid conveying apparatus Apr. 17, 2012
8147226 Valve assembly for pressure washer pump Apr. 3, 2012
8128385 Valve structure Mar. 6, 2012
8100103 Reciprocating piston cylinder head cover having an integrated fluid exchange rotary disc valve Jan. 24, 2012
8096791 Suction valve for a small hermetic compressor Jan. 17, 2012
8074679 Y-type fluid end with replaceable suction module Dec. 13, 2011
8075287 Fluid pump having plunger and method of monoblock casting for housing of the same Dec. 13, 2011
8057200 Structure of discharging refrigerant for linear compressor Nov. 15, 2011
7959416 Suction system for a refrigeration compressor Jun. 14, 2011
7934913 Piston compressor, particularly a hermetic refrigerant compressor May. 3, 2011
7922459 Pressure generation device Apr. 12, 2011
7850437 Multi-port suction reed valve with optimized tips Dec. 14, 2010
7771176 Micropump and method for the production thereof Aug. 10, 2010
7762796 Pump valve with controlled stroke Jul. 27, 2010
7635257 High pressure pump having plunger Dec. 22, 2009
7632077 Inclined plate-type compressors and air conditioning systems including such compressors Dec. 15, 2009
7621728 Pump inlet manifold Nov. 24, 2009
7549861 Syringe for a combined dental irrigator and vacuum device Jun. 23, 2009
7497230 Priming pump with reed valve Mar. 3, 2009
7455506 Injection moldable piston rings Nov. 25, 2008
7413421 Multi-cylinder reciprocating compressor Aug. 19, 2008
7390178 Compressor Jun. 24, 2008
7390177 Piston compressor, particularly a hermetic refrigerant compressor Jun. 24, 2008
7390176 Multi-port suction reed valve with optimized tips Jun. 24, 2008
7387221 Fluid discharge pumping apparatus Jun. 17, 2008
7367789 Device for maintaining a static seal of a high pressure pump May. 6, 2008
7364412 System, method, and apparatus for valve stop assembly in a reciprocating pump Apr. 29, 2008
7296980 Intake valve for a high-pressure pump, in particular for internal combustion engine fuel Nov. 20, 2007
7284971 Hermetic compressor Oct. 23, 2007
7275561 Discharging valve assembly of reciprocating compressor Oct. 2, 2007
7273355 Compressor assembly with piston having multiple cross sections Sep. 25, 2007
7247006 Method and apparatus for sealing an ultrahigh-pressure fluid system Jul. 24, 2007
7232293 Manual hydraulic pump Jun. 19, 2007
7232294 Compressor having a discharge valve mechanism including a valve retainer having a specially-designed curved surface Jun. 19, 2007

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