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Class Information
Number: 137/533.31
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Reciprocating valves > Weight biased > Valve body is the weight > Guided head > Guide stem > Guide and closure integral unit
Description: Devices in which the casing closure and the guide for the rod-like element constitute a unit.










Patents under this class:

Patent Number Title Of Patent Date Issued
8381764 Check valve Feb. 26, 2013
8136548 Air admittance valve Mar. 20, 2012
7971605 Air admittance vent diaphragm assembly Jul. 5, 2011
7841359 Check valve Nov. 30, 2010
7640945 Oneway valve for automatically inflatable air cushion Jan. 5, 2010
7533692 Springless compressor valve May. 19, 2009
7506663 Magnetic check valve Mar. 24, 2009
7445022 Air admittance vent diaphragm assembly Nov. 4, 2008
7431048 Backflow preventer Oct. 7, 2008
7137491 Shock absorber non-vibrating check valve assembly Nov. 21, 2006
7108147 Vacuum pump valve Sep. 19, 2006
6988510 Disc check valve Jan. 24, 2006
6971862 Appartus for preventing overheat of scroll compressor Dec. 6, 2005
6892754 Poppet for a fuel vapor pressure management apparatus May. 17, 2005
6886592 Sewer relief valve with integral disinfectant means May. 3, 2005
6761182 Method for configuration of a valve Jul. 13, 2004
6666663 Gas suction apparatus for a reciprocating compressor with a piston inertia valve Dec. 23, 2003
RE37322 Two-piece check valve assembly Aug. 14, 2001
6132191 Check valve for scroll compressor Oct. 17, 2000
6116270 Piston valve Sep. 12, 2000
6029706 Valve of a storage tank for transporting oils or chemical compounds Feb. 29, 2000
5983927 Inlet valve assembly Nov. 16, 1999
5983929 Air valve Nov. 16, 1999
5921276 Piston-type check valve with diffuser Jul. 13, 1999
5836170 Vacuum release valve tube assembly Nov. 17, 1998
5669412 Two-piece check valve assembly Sep. 23, 1997
5620021 Thermal check valve Apr. 15, 1997
5383487 Refill-prevention valve Jan. 24, 1995
5286188 Uni-directional anti-backsifting fluidization nozzle and a fluidized bed system utilizing same Feb. 15, 1994
5209257 Sewer relief valve May. 11, 1993
5048560 Sealing valve assembly Sep. 17, 1991
4827972 Priority flow control valve May. 9, 1989
4813817 Plug valve Mar. 21, 1989
4738277 Improvement in rotatable taps Apr. 19, 1988
4683910 High-speed protective check valving for pressure transducers and the like Aug. 4, 1987
4657040 Bypass reverse flow valve Apr. 14, 1987
4625755 Kelly mud saver valve sub Dec. 2, 1986
4572233 Lined check valve Feb. 25, 1986
4535807 Automatic air valve device for ducts Aug. 20, 1985
4470767 Vacuum pump with overload protection valve Sep. 11, 1984
4274434 Automatic low-friction check valve Jun. 23, 1981
4266568 Vacuum breaker-pressure release device May. 12, 1981
4259984 Valve construction Apr. 7, 1981
4080107 Bellows pump and pumping plant for oil-filled electric cables Mar. 21, 1978
4026318 Valve for giant tires May. 31, 1977
4016900 Springless valve for pneumatic tires and the like Apr. 12, 1977











 
 
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