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Class Information
Number: 137/529
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Reciprocating valves > Plural biasing means
Description: Valves in which the biasing means comprises more than one bias force providing element exclusive of the weight of the valve body itself.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8517703 Compressor including valve assembly Aug. 27, 2013
8474479 Multifunction relief valve and airplane emergency hydraulic power source unit having the same Jul. 2, 2013
8434508 Relief valve May. 7, 2013
8375984 Multiple preset indexing pressure relief valve Feb. 19, 2013
8365753 Fluid flow controller Feb. 5, 2013
8316880 Oil filter bypass valve assembly for a generator Nov. 27, 2012
8297943 Pump control using overpressure source Oct. 30, 2012
8281804 Pressure relief valves Oct. 9, 2012
8215336 Fluid balancing relief valve with grooved process surface Jul. 10, 2012
8136544 Sealing arrangement with a segmented seal and pressure relief Mar. 20, 2012
7946290 Underwater exhaust system and method May. 24, 2011
7819131 Springless compressor valve Oct. 26, 2010
7631591 Two stage spool centering mechanism Dec. 15, 2009
7628169 Safety relief valve having a low blow-down value and spring therefore Dec. 8, 2009
7552744 Decompression valve Jun. 30, 2009
7533692 Springless compressor valve May. 19, 2009
7506663 Magnetic check valve Mar. 24, 2009
7458392 Spring actuated check valve Dec. 2, 2008
7398795 Excess flow valve Jul. 15, 2008
7334603 Check valve Feb. 26, 2008
7310942 Exhaust passage control valve Dec. 25, 2007
7302961 Surge relief valve Dec. 4, 2007
7255323 Pressure activated valve Aug. 14, 2007
7216669 Pressure regulating valve for common rail fuel injection systems May. 15, 2007
7207350 Pressure valve Apr. 24, 2007
7159613 Pressure limiting valve in a hydraulic machine having a pressure limiting valve Jan. 9, 2007
7025085 Radial poppet-type check valve with closure assist feature Apr. 11, 2006
6983762 Pressure regulator for a fuel supply system of an internal combustion engine Jan. 10, 2006
6981654 Apparatus for intermittent liquid dispersal Jan. 3, 2006
6976668 Roll diaphragm control valve Dec. 20, 2005
6945272 Passively actuated valve Sep. 20, 2005
6935364 Magnetically-operated relief valves Aug. 30, 2005
6923199 Damage resistant valve assembly Aug. 2, 2005
6837266 Remotely actuated multiple pressure direct acting relief valve Jan. 4, 2005
6830064 Leak control valve Dec. 14, 2004
6739847 Structure of check valve with silencing cover May. 25, 2004
6732947 Apparatus for intermittent liquid dispersal May. 11, 2004
6651696 Relief valve Nov. 25, 2003
6648012 Non-return valve override device Nov. 18, 2003
6637456 Safety valve Oct. 28, 2003
6612338 Fuel tank pressure control valve Sep. 2, 2003
6581630 Pressure control valve Jun. 24, 2003
6571818 Damage resistant break away valve stem Jun. 3, 2003
6514232 Vacuum adjustment valve, particularly for thoracic drainage devices Feb. 4, 2003
6513545 Safety valve with adjustable maximum flow shut off mechanism Feb. 4, 2003
6510867 Pressure relief valve Jan. 28, 2003
6443184 Radially loaded, poppet-type check valve Sep. 3, 2002
6443183 Valve and assembly for axially movable members Sep. 3, 2002
6390121 Check valve controlled by differential pressure May. 21, 2002
6341621 Valve structure for a fluid operated device Jan. 29, 2002

1 2 3 4










 
 
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