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Class Information
Number: 137/513.7
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > With leak passage > Bypass in valve casing
Description: Devices in which a passage permitting limited flow around the head and seat elements is provided in the valve body structure.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8240329 Fluid control valve Aug. 14, 2012
8096316 Valve systems for use with a fluid injector system Jan. 17, 2012
8092198 Fuel pump for internal combustion engine Jan. 10, 2012
7604063 Flow valve and method Oct. 20, 2009
7578129 Multiple-turbocharger system, and exhaust gas flow control valve therefor Aug. 25, 2009
7296594 Combination check valve and neutral valve assembly for use in a hydraulic component Nov. 20, 2007
7171972 Passive back-flushing thermal energy system Feb. 6, 2007
7128090 Water-hammer preventing unit for check valve Oct. 31, 2006
7069946 Slow-release check valve Jul. 4, 2006
6952922 Choke valve of clutch release cylinder Oct. 11, 2005
6953325 Safety device to limit pressure in an axial-piston compressor housing Oct. 11, 2005
6866062 Check valve Mar. 15, 2005
6834671 Check valve for micro electro mechanical structure devices Dec. 28, 2004
6830064 Leak control valve Dec. 14, 2004
6827091 Passive back-flushing thermal energy system Dec. 7, 2004
6619182 Flow control device Sep. 16, 2003
6604938 Device for gas burners Aug. 12, 2003
6263912 Fluid flow control valve Jul. 24, 2001
6263911 Fluid flow control valve Jul. 24, 2001
6260575 Fluid flow control valve Jul. 17, 2001
6199584 Fluid flow control valve Mar. 13, 2001
6119454 Exhaust manifold device Sep. 19, 2000
6014820 Shuttle valve for twin tower air dryer Jan. 18, 2000
5931191 Flow control valve for passing two fluids in opposite directions Aug. 3, 1999
5789045 Microtubes devices based on surface tension and wettability Aug. 4, 1998
5762093 Fuel overflow restrictor/water intake restraining devices Jun. 9, 1998
5762104 Liquid pumping system with pressure relief mechanism Jun. 9, 1998
5706873 Automotive fluid recovery apparatus Jan. 13, 1998
5655567 Valve assembly for transmission Aug. 12, 1997
5529091 Check valve Jun. 25, 1996
5525046 High pressure cleaning device with leakage flow arrangement Jun. 11, 1996
5388621 Pressurized transfer tank security system Feb. 14, 1995
5305794 Valve structure Apr. 26, 1994
5236425 Self-adjusting suction regulator Aug. 17, 1993
5183076 Unidirectional flow limiter Feb. 2, 1993
5178240 Adjustable double-acting damper Jan. 12, 1993
5148830 Flow control device Sep. 22, 1992
5082557 Control head for water purifier Jan. 21, 1992
5052433 Starter connection for progressive pressurizing of pneumatic installations Oct. 1, 1991
5018607 Hydraulic dashpot for pipeline systems May. 28, 1991
4838392 Semi-active damper for vehicles and the like Jun. 13, 1989
4821850 Double-tube vibration damper Apr. 18, 1989
4804163 Key button type of water tap Feb. 14, 1989
4796704 Drop ball sub-assembly for a down-hole device Jan. 10, 1989
4742849 Angled pneumatic connection including means for regulating a one-way flow May. 10, 1988
4733690 Hydraulic valve Mar. 29, 1988
4679778 Fluid-containing power unit mounting device Jul. 14, 1987
4664141 Minimum pressure retention valve May. 12, 1987
4564483 Method and apparatus for batch carbonating Jan. 14, 1986
4514742 Printer head for an ink-on-demand type ink-jet printer Apr. 30, 1985

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