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Class Information
Number: 137/454.4
Name: Fluid handling > Removable valve head and seat unit > Pump type
Description: Devices which are designed to be used as inlet or outlet valves, or both, of fluid compressors or pumps.










Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8709357 Micro-fluidic device Apr. 29, 2014
8365754 Valve cover assembly and method of using the same Feb. 5, 2013
8052406 Scroll machine having improved discharge valve assembly Nov. 8, 2011
7975717 Pin insert Jul. 12, 2011
7891374 Suction valve Feb. 22, 2011
7785086 Supply device Aug. 31, 2010
7721757 Discharge check valve assembly for use with hermetic scroll compressor May. 25, 2010
7296591 Valve arrangement for reciprocating machinery such as a pump and an compressor Nov. 20, 2007
7290559 Check valve for a high-pressure pump of a fuel injection system for an internal combustion engine Nov. 6, 2007
7290560 Valve cover locking system Nov. 6, 2007
7195464 Hydraulic axial piston pump Mar. 27, 2007
6932109 Scavenger valve assembly Aug. 23, 2005
6880577 Reed valve assembly Apr. 19, 2005
6866489 Piston pump Mar. 15, 2005
6805157 Structure for fixing check valve Oct. 19, 2004
6786232 Check valve for a piston pump Sep. 7, 2004
6783337 Check valve seal assembly Aug. 31, 2004
6622751 Pressure valve for a reciprocating pump Sep. 23, 2003
6524084 Motor pump unit Feb. 25, 2003
6406278 High-pressure pump with a removable on-off valve for feeding fuel to an internal combustion engine Jun. 18, 2002
6354819 Diaphragm pump including improved drive mechanism and pump head Mar. 12, 2002
6314990 Pressure valve for a compressor Nov. 13, 2001
6224350 Radial piston pump for high-pressure fuel delivery May. 1, 2001
6190144 Compressor having easily installed check valves Feb. 20, 2001
6019124 Valve assembly for use with high pressure pumps Feb. 1, 2000
5921273 Delivery valve assembly for compressor Jul. 13, 1999
5839468 Pump valve Nov. 24, 1998
5709536 Hydro mechanical packingless pump and liquid spray system Jan. 20, 1998
5655567 Valve assembly for transmission Aug. 12, 1997
5649810 Apparatus for delivering fluid to a patient Jul. 22, 1997
5636975 Inlet and discharge valve arrangement for a high pressure pump Jun. 10, 1997
5605449 Suction and discharge valve arrangement for a high pressure piston pump Feb. 25, 1997
5584671 Apparatus for delivering fluid to a patient Dec. 17, 1996
5411380 High pressure homogenizing pump having removable check valve modules May. 2, 1995
5387092 A/C compressor with integrally molded housings Feb. 7, 1995
5348046 Spring check valve cartridge Sep. 20, 1994
5287883 Valve, in particular for compressors Feb. 22, 1994
5249595 Valve, in particular for a piston-type compressor Oct. 5, 1993
5238019 Hold-down assemblage for a gas compressor valve assembly Aug. 24, 1993
5213485 Air driven double diaphragm pump May. 25, 1993
5171136 Fluid flow control device Dec. 15, 1992
5161565 Cover and retainer for a compressor valve Nov. 10, 1992
5154589 Metering pump Oct. 13, 1992
4974628 Check valve cartridges with controlled pressure sealing Dec. 4, 1990
4878815 High pressure reciprocating pump apparatus Nov. 7, 1989
4862911 Check valve assembly for high pressure pumps Sep. 5, 1989
4846636 Parenteral solution pump assembly Jul. 11, 1989
4773833 High pressure homogenizer pump Sep. 27, 1988
4768547 Parenteral solution pump assembly Sep. 6, 1988
4708168 Valved body for hermetic motor-compressors for refrigerant fluids Nov. 24, 1987

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