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Class Information
Number: 137/220
Name: Fluid handling > Larner-johnson type valves; i.e., telescoping internal valve in expanded flow line section > Line condition change responsive
Description: Flow control devices in which the valve is actuated in response to a change in condition of the fluid handled.










Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8544493 Water hammer proof and silent check valve Oct. 1, 2013
8381764 Check valve Feb. 26, 2013
8365764 Minimum pressure valve Feb. 5, 2013
8281810 Dry valve for sprinkler system Oct. 9, 2012
8136543 Axial flow control valves having an internal actuator Mar. 20, 2012
8113228 Suction valve Feb. 14, 2012
7640944 Valve for prevention of low flow rates through flow meter Jan. 5, 2010
7628016 Method of effecting multistage super-charging in internal combustion engines Dec. 8, 2009
7588047 Compressor bypass valve for use in multistage supercharging Sep. 15, 2009
7040339 Suction inlet valve for fire truck pumpers May. 9, 2006
6915813 Check valve Jul. 12, 2005
6752168 System for controlling the working conditions for mechanical pumps, and a regulation valve for such a system Jun. 22, 2004
6742539 Co-axial control valve Jun. 1, 2004
6684895 Fluid control valve apparatus and method Feb. 3, 2004
6279594 Flow actuated valve Aug. 28, 2001
6230734 Flow-rate controller May. 15, 2001
6132191 Check valve for scroll compressor Oct. 17, 2000
5921276 Piston-type check valve with diffuser Jul. 13, 1999
5715857 Multi-use valve Feb. 10, 1998
5540252 Pneumatically stabilized inline valve Jul. 30, 1996
5435337 Inline control valve for controlling fluid flow Jul. 25, 1995
5375621 Check valves Dec. 27, 1994
5320130 Valve block assembly for I.S. machine Jun. 14, 1994
5314299 Speed governor for a pneumatic power tool May. 24, 1994
5141420 Scroll compressor discharge valve Aug. 25, 1992
5104038 Thermostat apparatus Apr. 14, 1992
5080122 Non-return valve Jan. 14, 1992
4911196 Inline check valve Mar. 27, 1990
4747426 Check valve May. 31, 1988
4732189 Fast opening valve Mar. 22, 1988
4681130 Combined pressure regulated and check valve Jul. 21, 1987
4651768 Servovalve for pipe flange connection Mar. 24, 1987
4638832 Nonreturn piston slide valve Jan. 27, 1987
4637428 Fluid flow control valves Jan. 20, 1987
4516600 Pressure regulating valves May. 14, 1985
4479507 Fluid pressure operated valve Oct. 30, 1984
4474207 Pressure regulator Oct. 2, 1984
4437485 Check valve Mar. 20, 1984
4429709 Cascade-based method and device for fluid handling and measurement Feb. 7, 1984
4416301 Annular piston valve Nov. 22, 1983
4373544 Check valve Feb. 15, 1983
4254634 Control valve to be employed for refrigerator and air conditioner Mar. 10, 1981
4195774 Dual in-line valve construction Apr. 1, 1980
4136713 Hydraulic circuit units Jan. 30, 1979
4116212 Unidirectional flow control valve Sep. 26, 1978
4077425 Fluid flow control devices Mar. 7, 1978
4008733 Filling valves for pressure fueling devices Feb. 22, 1977
3993093 Non-return valve Nov. 23, 1976
3972448 Aircraft refueling system Aug. 3, 1976
3963044 Pilot valve operated pressure regulator Jun. 15, 1976

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