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Class Information
Number: 137/519
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Biased open > Weight biased
Description: Valves in which the bias means is a weight which may be the weight of the valve body itself.










Sub-classes under this class:

Class Number Class Name Patents
137/519.5 Ball valves 93
137/520 Edge pivoted valve 8


Patents under this class:

Patent Number Title Of Patent Date Issued
8607746 Cooling system expansion tank Dec. 17, 2013
8534310 Hot water circulation system Sep. 17, 2013
8251092 Flow based pressure isolation mechanism for a fluid delivery system Aug. 28, 2012
7766028 Pressure regulator Aug. 3, 2010
7033133 Air turbine starter having a low differential check valve Apr. 25, 2006
6382250 Solenoid valve with a check valve May. 7, 2002
6363963 Excess flow shutoff valve Apr. 2, 2002
6250331 Zero crack-pressure, high-flow valve Jun. 26, 2001
6112758 Gas line automatic shut-off assembly Sep. 5, 2000
6062247 One-piece shut-off valve May. 16, 2000
5983928 Gas safety valve Nov. 16, 1999
5975130 Check valve with a low inertia moving part for low or high pressure differentials Nov. 2, 1999
5967178 Flow-controlled one-way valve Oct. 19, 1999
5857487 Automatic water shut off valve Jan. 12, 1999
5743295 Valve construction and method of use Apr. 28, 1998
5487406 Drain control valve and manifold system Jan. 30, 1996
5456281 Gas regulator with double stabilizing function Oct. 10, 1995
5452998 Non-contact vane-type fluid displacement machine with suction flow check valve assembly Sep. 26, 1995
5417565 Automatic instant lighting system for liquid fuel burner May. 23, 1995
5234027 Fluid flow inhibitor for use in a static flow system device Aug. 10, 1993
5141023 Flow actuated safety valve Aug. 25, 1992
4930686 Self-pressurizing sprayer having inlet pressure responsive valve Jun. 5, 1990
4907616 Check valve assembly Mar. 13, 1990
4872476 Check valve for engine cooling system Oct. 10, 1989
4792113 Fluid flow control valve Dec. 20, 1988
4784175 Valve Nov. 15, 1988
4753642 Container-valve assembly Jun. 28, 1988
4739612 Shuttle valve for oil tank filler neck Apr. 26, 1988
4708176 Riser for drawing off liquids Nov. 24, 1987
4697607 Procedure and means for making the effect of gravity the same in flow regulators independent of the installation mode Oct. 6, 1987
4694854 Device for regulating the discharge of fluid from a container Sep. 22, 1987
4694851 Flow regulator and its use Sep. 22, 1987
4683910 High-speed protective check valving for pressure transducers and the like Aug. 4, 1987
4678005 Flow regulator Jul. 7, 1987
4674531 Flow regulator Jun. 23, 1987
4624443 Fluid-flow control valve Nov. 25, 1986
4566476 Flow control device Jan. 28, 1986
4548232 Valve assembly Oct. 22, 1985
4310017 Backflow check valve for use with IV administration sets Jan. 12, 1982
4262692 Bell trap and check valve combination Apr. 21, 1981
4201243 Check valves May. 6, 1980
4128105 Automatic shut-off valve and method of operation thereof Dec. 5, 1978
4059124 Valved stopper for a urine bottle Nov. 22, 1977
3930613 Check valve having temperature response Jan. 6, 1976











 
 
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