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Class Information
Number: 137/493.3
Name: Fluid handling > Line condition change responsive valves > Bi-directional flow valves > One head and seat carried by head of another > Supporting valve spring carried by supporting valve
Description: Apparatus wherein the spring for the carried valve is mounted on the supporting valve.










Sub-classes under this class:

Class Number Class Name Patents
137/493.5 Spring abuts guide for supported valve stem 17
137/493.4 Spring stop on supported valve stem 29


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8459286 Pressure retention valve and integrated valve for tank system Jun. 11, 2013
8302621 Pressure limiting valve with reduced differential area Nov. 6, 2012
7568497 Combined check valve and pressure relief valve Aug. 4, 2009
7509969 Two-way check valve Mar. 31, 2009
7451780 Multifunction valve for use in a hydraulic component Nov. 18, 2008
7331323 Lubricating oil supplying system for internal combustion engine Feb. 19, 2008
7320334 Valve Assembly Jan. 22, 2008
7219683 Cut valve with check valve May. 22, 2007
7201183 Valve arrangement in a hydraulic circuit, use of the same and arrangement for controlling a hydraulic vehicle drive Apr. 10, 2007
7086388 Combination valve for fuel system Aug. 8, 2006
7021326 Combination inflation and relief valve Apr. 4, 2006
6802332 Shear valve Oct. 12, 2004
6772790 Fuel tank Aug. 10, 2004
6283094 Pressure valve Sep. 4, 2001
6261069 Shaft seal with pressure equalizing shuttle Jul. 17, 2001
6234195 Check valve for fuel tank fill pipe May. 22, 2001
6196201 Pressure valve Mar. 6, 2001
5950669 Pressure valve Sep. 14, 1999
5911239 Metering valve Jun. 15, 1999
5807081 Combination valve for screw compressors Sep. 15, 1998
5582202 Air conditioner system charge/relief valve Dec. 10, 1996
5546981 Check valve Aug. 20, 1996
5479978 Pressure-vacuum relief valve assembly Jan. 2, 1996
5454394 Emergency shut-off valves Oct. 3, 1995
5311901 Pressure interrupter device May. 17, 1994
5293897 Pressure valve Mar. 15, 1994
5193569 Emergency shut-off valves Mar. 16, 1993
5127313 Pressurized oil supply/discharge circuit and valve device for use in said circuit Jul. 7, 1992
5125323 Pressurized oil supply/discharge circuit and valve device for use in such circuit Jun. 30, 1992
5099870 Emergency shut-off valves Mar. 31, 1992
5074330 Anti-abnormal-pressure/vacuum valve Dec. 24, 1991
5029604 Safety core for tire valve Jul. 9, 1991
4989590 Irrigation appliance Feb. 5, 1991
4979675 Pressure control valve Dec. 25, 1990
4969697 Pressure differential release valve Nov. 13, 1990
4926902 Pressure equalizer valve device of fuel injection pump May. 22, 1990
4840160 Valve control device Jun. 20, 1989
4838462 Double bellows purge valve Jun. 13, 1989
4834134 Two-way delivery valve structure of a fuel discharge valve in a fuel injection pump May. 30, 1989
4736768 Relief valve of hydraulic devices Apr. 12, 1988
4727792 Hydraulic holding valve Mar. 1, 1988
4692102 Fuel injection pump for internal combustion engines Sep. 8, 1987
4673051 Power steering gear with two-way check valve Jun. 16, 1987
4651779 Constant-pressure delivery valve for fuel injection pumps for diesel engines Mar. 24, 1987
4648369 Pressure valve Mar. 10, 1987
4628957 Pressure valve for fuel injection pump Dec. 16, 1986
4602707 Vehicular shock absorbing device with improved compression head assembly Jul. 29, 1986
4596263 Apparatus for controlling hydraulic flow of liquid under pressure in a pipeline Jun. 24, 1986
4593711 Pressure and vacuum relief valve mechanism for a fluid storage tank Jun. 10, 1986
4577606 Pressure valve assembly for fuel injection pumps Mar. 25, 1986

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