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Class Information
Number: 137/542
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Reciprocating valves > Spring biased > Spring coaxial with valve > Valve stem extends through fixed spring abutment
Description: Valves in which the valve has a stem which passes through the biasing spring, which is mounted between abutments one of which is fixed and comprises a guide for the stem and the other of which is carried by or comprised in the valve head and/or stem.










Sub-classes under this class:

Class Number Class Name Patents
137/543 Yoke or cage-type support for valve stem 52


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8667982 Air valve device for an inflatable article Mar. 11, 2014
8640271 Cartridge unit and trap for sewer gas and odor containment Feb. 4, 2014
8561703 Compliant dart-style reverse-flow check valve Oct. 22, 2013
8544497 Fluid transfer device and system Oct. 1, 2013
8517051 Automatic flow control regulator valve Aug. 27, 2013
8490720 Self aligning mud saver valve seat Jul. 23, 2013
8408244 Sanitary installation part Apr. 2, 2013
8381764 Check valve Feb. 26, 2013
8356587 PCV valve guide Jan. 22, 2013
8307848 Freeze resistant manifold assembly and system Nov. 13, 2012
8230875 Check valve Jul. 31, 2012
8152909 Gas chromatography check valve and system Apr. 10, 2012
8147225 Pump valve having a limiting element Apr. 3, 2012
8061382 Sanitary valve assembly Nov. 22, 2011
7946290 Underwater exhaust system and method May. 24, 2011
7891374 Suction valve Feb. 22, 2011
7850149 Pressure blast pre-filming spray nozzle Dec. 14, 2010
7726335 Check valve apparatus for fuel delivery systems Jun. 1, 2010
7721757 Discharge check valve assembly for use with hermetic scroll compressor May. 25, 2010
7673651 Flow regulating device Mar. 9, 2010
7654509 Desuperheater spray nozzle Feb. 2, 2010
7469712 Relief valve Dec. 30, 2008
7431048 Backflow preventer Oct. 7, 2008
7426932 Spray fill device and method for using the same Sep. 23, 2008
7401619 Air valve device for an inflatable article Jul. 22, 2008
7389791 Backflow preventer Jun. 24, 2008
7367354 Check valve May. 6, 2008
7300482 Particle separation apparatus Nov. 27, 2007
7290559 Check valve for a high-pressure pump of a fuel injection system for an internal combustion engine Nov. 6, 2007
7172175 Suction valve Feb. 6, 2007
7143784 Sanitary fitting Dec. 5, 2006
7128088 Backflow preventer Oct. 31, 2006
7074020 Sanitary pump and sanitary valve Jul. 11, 2006
7028994 Pressure blast pre-filming spray nozzle Apr. 18, 2006
7004195 Discharge valve Feb. 28, 2006
6994108 Check valve for fuel pump Feb. 7, 2006
6968858 Check valve Nov. 29, 2005
6899312 Pressure relief valve for flowing media May. 31, 2005
6877525 Check valve for fuel pump Apr. 12, 2005
6868860 Fire hydrant with second valve Mar. 22, 2005
6866062 Check valve Mar. 15, 2005
6837267 Cartridge insert for a fluid line Jan. 4, 2005
6755629 Fuel injection pump having one-way valve for supplying fuel into pressurizing chamber Jun. 29, 2004
6746001 Desuperheater nozzle Jun. 8, 2004
6736162 Pressure relief valve with improved repairability May. 18, 2004
6719544 Valve for scroll compressor Apr. 13, 2004
6698450 Discharge valve Mar. 2, 2004
6668853 Pressure relief valve with field-replaceable high corrosion-resistant components Dec. 30, 2003
6613096 Prosthetic pressure relief valve system Sep. 2, 2003
6581633 Check valve and method of fabrication Jun. 24, 2003

1 2 3










 
 
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