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Class Information
Number: 137/512.5
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Plural > With common biasing means
Description: Devices in which the valves are urged toward or away from their seats by the same biasing means.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8667794 Valve seat and gasket for exhaust bypass valve Mar. 11, 2014
8066560 System and method for information handling system floor tile cooling airflow measurement Nov. 29, 2011
7950910 Piston cartridge May. 31, 2011
7806135 Variable flow valve Oct. 5, 2010
7600530 Connector with check valve and method of use Oct. 13, 2009
7428914 Flow control valve Sep. 30, 2008
7415820 Hybrid powertrain with valve assembly for dual pumps Aug. 26, 2008
7367788 Pump for antilock braking system in vehicle May. 6, 2008
7311740 Snap acting split flapper valve Dec. 25, 2007
6705260 Reed valve VCT phaser with worm trails Mar. 16, 2004
6578604 Ball valve with slot for continuous flow Jun. 17, 2003
6394219 Hydraulic power steering system with a pressure relief valve May. 28, 2002
6382244 Reciprocating pump standing head valve May. 7, 2002
6231323 High pressure reciprocating pump May. 15, 2001
5957157 Pilot operated pressure/vacuum vent for a fuel storage tank Sep. 28, 1999
5931191 Flow control valve for passing two fluids in opposite directions Aug. 3, 1999
5823870 Method and apparatus for reducing exhaust flap movement Oct. 20, 1998
5707283 Dual baffle system in automatic air inlets for livestock facilities Jan. 13, 1998
5465752 Multi-function valve for a riser in a sprinkler system Nov. 14, 1995
5419689 Vacuum pump having oil-actuated inlet valve May. 30, 1995
5287841 Flow divider and utilization system Feb. 22, 1994
5241986 Check valve assembly for high-pressure applications Sep. 7, 1993
5183075 Check valve Feb. 2, 1993
5176171 Check valve Jan. 5, 1993
5174463 Cap for a container, especially a vehicle radiator Dec. 29, 1992
5095939 Redundant pressurizing valve Mar. 17, 1992
5046755 Hydropneumatic suspension system Sep. 10, 1991
5018607 Hydraulic dashpot for pipeline systems May. 28, 1991
5004009 Valve device for controlling liquid flow Apr. 2, 1991
4962786 Hydraulic fuse with pressure regulator Oct. 16, 1990
4862911 Check valve assembly for high pressure pumps Sep. 5, 1989
4818194 Check valve assembly for fluid pressure intensifying apparatus Apr. 4, 1989
4798226 Charging valve Jan. 17, 1989
4742841 Water shut-off valve May. 10, 1988
RE32362 Fire damper and method of fabrication Feb. 24, 1987
4602654 Coupling for fire hydrant-fire hose connection Jul. 29, 1986
4484597 Homogenizer device, in particular for the production of whipped cream Nov. 27, 1984
4467824 Self-closing fire damper for duct Aug. 28, 1984
4392507 Two-stage pressure relief valve Jul. 12, 1983
4368752 Compound check valve Jan. 18, 1983
4366830 Damper assembly Jan. 4, 1983
4249566 Fluid pressure-operated valves Feb. 10, 1981
4192343 Full-flow relief valve Mar. 11, 1980
4131235 Dual-function valve Dec. 26, 1978
4130133 Bypass valving fluid control arrangement Dec. 19, 1978
4116201 Catheter with inflation control device Sep. 26, 1978
4099540 Two-way bypass valve Jul. 11, 1978
4096928 Valve assembly for a shock absorber Jun. 27, 1978
4083437 Shock absorber valve Apr. 11, 1978
4046163 Relief valve Sep. 6, 1977

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