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Class Information
Number: 137/493.6
Name: Fluid handling > Line condition change responsive valves > Bi-directional flow valves > One head and seat carried by head of another > Both valves spring biased
Description: Apparatus wherein both the carried and carrying valves are spring biased.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8657590 Hydraulic power steering system with charging valve and air cushion in the tank Feb. 25, 2014
8561637 Vent valve Oct. 22, 2013
8561638 Check valve Oct. 22, 2013
8469051 Valve for limiting the tank pressure in a motor vehicle Jun. 25, 2013
8459286 Pressure retention valve and integrated valve for tank system Jun. 11, 2013
8302621 Pressure limiting valve with reduced differential area Nov. 6, 2012
8171953 Tank pressure and vacuum relief device May. 8, 2012
8127910 Latching frictional engagement assembly using a check valve Mar. 6, 2012
8066030 Fuel conveying device Nov. 29, 2011
7874820 Compressor unloading valve Jan. 25, 2011
RE41861 Decoupled check-relief valve Oct. 26, 2010
7665579 Flow control valve having pressure compensating valve Feb. 23, 2010
7624752 Inflation valve Dec. 1, 2009
7597153 Automotive onboard fire suppression system reservoir having multifunction control valve Oct. 6, 2009
7568497 Combined check valve and pressure relief valve Aug. 4, 2009
7481320 Filter device having a bi-directional valve Jan. 27, 2009
7451780 Multifunction valve for use in a hydraulic component Nov. 18, 2008
7392823 Combination valve Jul. 1, 2008
7367353 Combined check valve and pressure relief valve May. 6, 2008
7331323 Lubricating oil supplying system for internal combustion engine Feb. 19, 2008
7320334 Valve Assembly Jan. 22, 2008
7258134 Combination check valve and pressure rise rate valve Aug. 21, 2007
7201183 Valve arrangement in a hydraulic circuit, use of the same and arrangement for controlling a hydraulic vehicle drive Apr. 10, 2007
7140385 Valve arrangement for controlling hydraulic fluid in an axial piston machine Nov. 28, 2006
7086388 Combination valve for fuel system Aug. 8, 2006
7066199 Valve assembly Jun. 27, 2006
7028708 Combined check valve and pressure relief valve Apr. 18, 2006
7021326 Combination inflation and relief valve Apr. 4, 2006
6986363 Valve assembly for use in a hydraulic component Jan. 17, 2006
6929025 Two-way valve Aug. 16, 2005
6910502 Decoupled check-relief valve Jun. 28, 2005
6875343 Dual direction bypass valve Apr. 5, 2005
6719005 Combination check valve and pressure release valve Apr. 13, 2004
6619497 Apparatus for venting a container containing fluid Sep. 16, 2003
6393962 Power steering apparatus May. 28, 2002
6357415 Fuel shut-off device for internal combustion engine Mar. 19, 2002
6305412 Double acting pressure relief valve with low pressure seal Oct. 23, 2001
6148853 Damper valve for hydraulic power steering device Nov. 21, 2000
6029694 Diaphragm pressure regulating valve assembly Feb. 29, 2000
6026848 Pressure relief valve Feb. 22, 2000
6006781 Fuel pressure regulator Dec. 28, 1999
5950669 Pressure valve Sep. 14, 1999
5807081 Combination valve for screw compressors Sep. 15, 1998
5778925 Pressure regulation valve Jul. 14, 1998
5666989 Tank venting control assembly Sep. 16, 1997
5634489 Hydraulic fuse Jun. 3, 1997
5582198 Bidirectional valve and fuel shut-off device Dec. 10, 1996
5582202 Air conditioner system charge/relief valve Dec. 10, 1996
5183075 Check valve Feb. 2, 1993
5165445 Relief vent apparatus Nov. 24, 1992

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