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Class Information
Number: 137/515.5
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > In couplings for coaxial conduits, e.g., drill pipe check valves > Valve seat formed on or carried by a coupling element
Description: Devices in which the valve seat element is formed as an integral part of one of the coupling elements or is separate but carried by one of the coupling elements.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8662101 Device for inserting a shut-off device in a pipeline Mar. 4, 2014
8561703 Compliant dart-style reverse-flow check valve Oct. 22, 2013
8316881 Fuel tank check valve Nov. 27, 2012
8281807 Fluid path connectors and container spikes for fluid delivery Oct. 9, 2012
8267376 Quick connect valve with integral backflow valve Sep. 18, 2012
7789103 Dense phase induction system and method Sep. 7, 2010
7721763 Adjustable pressure relief valve May. 25, 2010
7654283 Check valve and pump including check valve Feb. 2, 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
7438090 Booster valve Oct. 21, 2008
7360557 Low pressure drop check valve Apr. 22, 2008
7302971 Umbrella valve and assembly Dec. 4, 2007
7284568 Safety valve unit Oct. 23, 2007
7234480 Telescopic snap valve Jun. 26, 2007
7222637 Connector equipped with a valve May. 29, 2007
7219690 Flow control valve May. 22, 2007
7198061 Valve Apr. 3, 2007
7171981 Flow control device and system Feb. 6, 2007
7128091 Sexless coupling for fire hydrant-fire hose connection Oct. 31, 2006
7069946 Slow-release check valve Jul. 4, 2006
7028709 One-way valve with poppet member Apr. 18, 2006
6988510 Disc check valve Jan. 24, 2006
6948521 Check valve device Sep. 27, 2005
6945277 Underpressure valve Sep. 20, 2005
6938641 Check valve Sep. 6, 2005
6923206 Excess flow valve with magnet Aug. 2, 2005
6889707 Pressure actuated shut-off valve with membrane May. 10, 2005
6848722 Coupling Feb. 1, 2005
6830064 Leak control valve Dec. 14, 2004
6802491 Fluid shut off valve cartridge with quick connection Oct. 12, 2004
6564828 Check valve May. 20, 2003
6508269 Quick connector with one-way check valve Jan. 21, 2003
6488047 Excess flow valve Dec. 3, 2002
6412514 Flip check valve Jul. 2, 2002
6401749 Asymmetrically loaded check valve Jun. 11, 2002
6260578 Spud assembly for a fuel tank Jul. 17, 2001
6158458 Medical intravenous administration line connectors having a luer or pressure activated valve Dec. 12, 2000
6026855 Fuel tank one-way flow valve quick connector Feb. 22, 2000
6009895 Free rotating inlet check valve for inflatable devices Jan. 4, 2000
6003622 Drill tube for use in upward rock drilling Dec. 21, 1999
5992462 Disc type check valve Nov. 30, 1999
5901743 Valve system, especially for use in veterinary syringes May. 11, 1999
5699859 Well water recirculation valve and method of manufacturing thereof Dec. 23, 1997
5660206 Fuel tank filler neck check valve Aug. 26, 1997
5609130 Non-return valve Mar. 11, 1997
5595213 Quick connector with check valve Jan. 21, 1997
5582204 Plug for quick disconnect coupling Dec. 10, 1996
5413142 Automatic fluid circulating system and method May. 9, 1995
5295506 Flow control apparatus Mar. 22, 1994

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