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Class Information
Number: 137/521
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Biased open > Pivoted valves
Description: Valves in which the valve body is pivotally mounted.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8636026 Backflow preventing apparatus for water closets Jan. 28, 2014
8316876 Flushing device with removable drain ring for potable water systems Nov. 27, 2012
8316882 Mechanical fuse to seal pipes upon unintended rupture Nov. 27, 2012
8191571 Fluid circuit breaker quick disconnect coupling Jun. 5, 2012
8025077 Mechanical fuse to seal pipes upon unintended rupture Sep. 27, 2011
7828011 Pneumatic safety valve Nov. 9, 2010
7789104 Backflow preventing apparatus for water closets Sep. 7, 2010
7639151 Liquid blocking apparatus and system equipped with an alarm or wireless calling device and a storing bag Dec. 29, 2009
7273062 Shut-off valve for preventing the flow of liquid through a conduit, and related processes Sep. 25, 2007
7114519 Normally open reverse flow flapper valve Oct. 3, 2006
6851255 Normally open reverse flow flapper valve Feb. 8, 2005
6789561 Excess-flow valve Sep. 14, 2004
6659735 Scroll compressor Dec. 9, 2003
6615864 Torsion spring pool cleaner reed valve Sep. 9, 2003
6604548 Safety valve Aug. 12, 2003
6589113 Vent closure member with lift spacer Jul. 8, 2003
6581629 Fluid-activatable device for shut-off under excess flow conditions Jun. 24, 2003
6345641 Fluid-activatable device for shut-off under excess flow conditions Feb. 12, 2002
6253788 Check valve for use in a filler pipe for filling a fuel tank Jul. 3, 2001
6066043 Oscillating baffle for airflow redirection and heat transfer enhancement May. 23, 2000
5992451 Reed valve for pool cleaner Nov. 30, 1999
5878773 Auxiliary flow path valve Mar. 9, 1999
5634229 Swiming pool cleaner Jun. 3, 1997
5586874 Reed valve arrangement for a reciprocating compressor Dec. 24, 1996
5513959 Valve for pump with priming circuit May. 7, 1996
5406977 Automatic flowrate regulator for ventilation and air-conditioning installations Apr. 18, 1995
5358518 Artificial venous valve Oct. 25, 1994
5350421 Prosthetic heart valve Sep. 27, 1994
5314467 Composite curvature bileaflet prosthetic heart valve with serpentine curve hinge recesses May. 24, 1994
5236451 Prosthetic heart valve Aug. 17, 1993
5193578 Irrigation line drain valve Mar. 16, 1993
5171137 Valve for a hermetic refrigeration compressor Dec. 15, 1992
5141020 Emergency vent valves for storage tanks Aug. 25, 1992
5088905 Check valve for scroll compressor Feb. 18, 1992
5004010 Hose rupture valve Apr. 2, 1991
4994077 Artificial heart valve for implantation in a blood vessel Feb. 19, 1991
4993886 Air regulating unit, process for regulating air flow, and use of a lifting body in such a system Feb. 19, 1991
4979651 Safety valve for a high pressure spray container Dec. 25, 1990
4874012 Magnetic operator flow device Oct. 17, 1989
4788999 Automatic servo-controlled valve with high-speed opening Dec. 6, 1988
4759696 Scroll compressor with biased-open exhaust valve Jul. 26, 1988
4730550 Piston cup and cylinder assembly Mar. 15, 1988
4694854 Device for regulating the discharge of fluid from a container Sep. 22, 1987
4642037 Reed valve for refrigeration compressor Feb. 10, 1987
4599991 Door for brew kettle Jul. 15, 1986
4523609 Volume flow or pressure regulating device Jun. 18, 1985
4488575 Volume flow regulator for ventilation systems Dec. 18, 1984
4453699 Gate and swing valve Jun. 12, 1984
4407613 Single line pressure-pressure pneumatic tube system Oct. 4, 1983
4377968 Fluid flow control means Mar. 29, 1983

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