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Class Information
Number: 137/514.5
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > With retarder or dashpot > End of valve moves inside dashpot chamber
Description: Devices in which the end of the valve reciprocates in a dashpot chamber.










Sub-classes under this class:

Class Number Class Name Patents
137/514.7 Enlarged piston on end of valve stem 71


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8596994 Compressor Dec. 3, 2013
8573248 Pneumatic vibration dampening device Nov. 5, 2013
8453670 Poppet valve with sloped purge holes and method for reducing a pressure force therein Jun. 4, 2013
8365764 Minimum pressure valve Feb. 5, 2013
8281804 Pressure relief valves Oct. 9, 2012
8136547 Poppet valve with diverging-converging flow passage and method to reduce total pressure loss Mar. 20, 2012
8056156 Vacuum relief unit and method for a pool Nov. 15, 2011
7938139 Smart reset relief valve May. 10, 2011
7913715 Relief valve including a check valve in a damping chamber Mar. 29, 2011
RE41861 Decoupled check-relief valve Oct. 26, 2010
7631656 Pressure control valve Dec. 15, 2009
7628016 Method of effecting multistage super-charging in internal combustion engines Dec. 8, 2009
7624748 Valve Dec. 1, 2009
7591283 Low rise rate direct acting relief valve Sep. 22, 2009
7591282 Damped, self-cleaning flow shutoff valve and associated methods Sep. 22, 2009
7588047 Compressor bypass valve for use in multistage supercharging Sep. 15, 2009
7552743 Self cleaning flow shutoff valve Jun. 30, 2009
7513270 Balanced safety relief valve Apr. 7, 2009
7429167 Scroll machine having a discharge valve assembly Sep. 30, 2008
7360557 Low pressure drop check valve Apr. 22, 2008
7311117 Reset relief valve Dec. 25, 2007
7287547 Inlet or outlet valve for a pump Oct. 30, 2007
7168446 High impact discharge valve Jan. 30, 2007
7159605 Chatter resistant shuttle valve Jan. 9, 2007
7159613 Pressure limiting valve in a hydraulic machine having a pressure limiting valve Jan. 9, 2007
7121267 Poppet for an integrated pressure management apparatus and fuel system and method of minimizing resonance Oct. 17, 2006
7121812 High pressure pump having replaceable plunger/valve cartridges Oct. 17, 2006
7117885 Reset relief valve Oct. 10, 2006
7033151 Check valve of scroll compressor Apr. 25, 2006
6971862 Appartus for preventing overheat of scroll compressor Dec. 6, 2005
6918381 Fuel return valve Jul. 19, 2005
6892709 Pressure regulator May. 17, 2005
6810907 Hydraulic tensioner with relief valve mechanism Nov. 2, 2004
6736161 Pressure regulating valve May. 18, 2004
6698446 Check valve Mar. 2, 2004
6676105 Self-contained hydraulic dampening for a solenoid operated spool valve Jan. 13, 2004
6675823 Relief valve Jan. 13, 2004
6622751 Pressure valve for a reciprocating pump Sep. 23, 2003
6581632 Automatic valve Jun. 24, 2003
6575192 Check valve for a prechamber assembly Jun. 10, 2003
6536413 Accumulator fuel injection apparatus for internal combustion engines Mar. 25, 2003
6532987 Relief valve Mar. 18, 2003
6443182 Non-slamming check valve Sep. 3, 2002
6439263 Pressure regulating valve and method for producing a pressure regulating valve Aug. 27, 2002
6435848 Variable capacity type compressor with check valve Aug. 20, 2002
6142176 Relief valve Nov. 7, 2000
6132191 Check valve for scroll compressor Oct. 17, 2000
6029706 Valve of a storage tank for transporting oils or chemical compounds Feb. 29, 2000
5975129 Hydraulically operated pressure relief valve Nov. 2, 1999
5927323 Pressure control valve Jul. 27, 1999

1 2










 
 
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