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Class Information
Number: 137/514
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > With retarder or dashpot
Description: Valves provided with a dashpot or other retarding means to prevent or reduce chattering or hunting of the valve.










Sub-classes under this class:

Class Number Class Name Patents
137/514.3 End of valve forms dashpot chamber 46
137/514.5 End of valve moves inside dashpot chamber 90


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8544493 Water hammer proof and silent check valve Oct. 1, 2013
8459298 Check valve for drain pipes Jun. 11, 2013
8443833 Check valve May. 21, 2013
8256741 Pneumatic pressure regulating valve Sep. 4, 2012
8240330 Squeeze film damper valve for compressor cylinders Aug. 14, 2012
8225811 Apparatus for the removal of moisture from a compressed air tank Jul. 24, 2012
8152133 Pneumatic pressure regulating valve Apr. 10, 2012
8096587 Vacuum brake booster housing and non-rotatable connecting element Jan. 17, 2012
7950621 Pneumatic pressure regulation valve May. 31, 2011
7540301 Compressor valve Jun. 2, 2009
7493913 Swimming pool vacuum relief safety valve Feb. 24, 2009
7455070 Swimming pool vacuum relief safety valve Nov. 25, 2008
7445017 Mesovalve modulator Nov. 4, 2008
7422029 Linear damper for check valve Sep. 9, 2008
7395790 Reed valve breather for evolution engine Jul. 8, 2008
7367134 Dishwasher vent assembly May. 6, 2008
7350539 Electromagnetic controlled fuel injection apparatus with poppet valve Apr. 1, 2008
7350538 Method of preventing inadvertent inflation of an inflatable prosthesis Apr. 1, 2008
7331361 Pressure relief valve with direct hydraulic damping Feb. 19, 2008
7320336 Plug incorporating pressure-sensitive valve Jan. 22, 2008
7302961 Surge relief valve Dec. 4, 2007
7249611 Check valve Jul. 31, 2007
7246635 Automatic flow rate control valve Jul. 24, 2007
7228869 Pressure limiting valve Jun. 12, 2007
7168446 High impact discharge valve Jan. 30, 2007
7159613 Pressure limiting valve in a hydraulic machine having a pressure limiting valve Jan. 9, 2007
7152622 Check valve Dec. 26, 2006
7111638 Excess flow shutoff Sep. 26, 2006
7063520 Suction valve assembly of reciprocating compressor Jun. 20, 2006
6983762 Pressure regulator for a fuel supply system of an internal combustion engine Jan. 10, 2006
6959726 Valve assembly for attenuating bounce of hydraulically driven members of a machine Nov. 1, 2005
6953051 Valve plate structure Oct. 11, 2005
6899113 Pressure relief valve May. 31, 2005
6848893 Compressor check valve Feb. 1, 2005
6766823 Valve apparatus for hermetic compressor Jul. 27, 2004
6585000 Pressure relief valve Jul. 1, 2003
6470909 Hydraulic system Oct. 29, 2002
6401749 Asymmetrically loaded check valve Jun. 11, 2002
6394770 Piston pump May. 28, 2002
6390121 Check valve controlled by differential pressure May. 21, 2002
6379133 Scroll compressor with reduced stiction surface for check valve Apr. 30, 2002
6345641 Fluid-activatable device for shut-off under excess flow conditions Feb. 12, 2002
6314990 Pressure valve for a compressor Nov. 13, 2001
6267135 ABS modulator with damping foam on exhaust diaphragm Jul. 31, 2001
6168418 Ignition system with delay switch for a gas appliance Jan. 2, 2001
6142176 Relief valve Nov. 7, 2000
5775886 Gas compressor with reciprocating piston with valve sheath Jul. 7, 1998
5769116 Composite action type water-hammer-preventive check valve Jun. 23, 1998
5746246 Water hammer preventing check valve May. 5, 1998
5685333 Check valve with hydraulic damping system Nov. 11, 1997

1 2 3










 
 
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