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Class Information
Number: 137/512.3
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Plural > Diverse types
Description: Devices in which the valves are of different types, e.g., disc valves and ball valves, or are of different size so that they operate at different pressures.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8684034 Pressure relief valve Apr. 1, 2014
8667794 Valve seat and gasket for exhaust bypass valve Mar. 11, 2014
8668015 Dual check valve Mar. 11, 2014
8640725 Connector for transferring fluid and method of use Feb. 4, 2014
8496454 Unloader system and method for a compressor Jul. 30, 2013
8490885 Integrated freeze protection and pressure relief valve Jul. 23, 2013
8459286 Pressure retention valve and integrated valve for tank system Jun. 11, 2013
8371330 Valve device Feb. 12, 2013
8353311 Anti-flooding device Jan. 15, 2013
8291932 Valve means Oct. 23, 2012
8196597 Check valve Jun. 12, 2012
8113226 Valve assemblies and related systems and methods Feb. 14, 2012
8011290 Apparatus for preparing a beverage suitable for consumption, such as coffee Sep. 6, 2011
8006325 Pumped shower drain system Aug. 30, 2011
7909056 Connector for transferring fluid and method of use Mar. 22, 2011
7748403 Pressure maintaining valve, tool, set and fuel injection system Jul. 6, 2010
7748385 Valved holding chamber for use with an aerosol medication delivery system Jul. 6, 2010
7740023 Check valve assemblies and related methods Jun. 22, 2010
7673651 Flow regulating device Mar. 9, 2010
7600530 Connector with check valve and method of use Oct. 13, 2009
7591291 Refueling assembly having a check valve receptacle and a replaceable fuel receiver for bottom-filled fuel tanks Sep. 22, 2009
7415921 Apparatus for preparing a beverage suitable for consumption, such as coffee Aug. 26, 2008
7367353 Combined check valve and pressure relief valve May. 6, 2008
7350538 Method of preventing inadvertent inflation of an inflatable prosthesis Apr. 1, 2008
7331360 Check valve with low shut off sound Feb. 19, 2008
7331361 Pressure relief valve with direct hydraulic damping Feb. 19, 2008
7258134 Combination check valve and pressure rise rate valve Aug. 21, 2007
7243676 Combination umbrella and inverted bi-directional valve Jul. 17, 2007
7028708 Combined check valve and pressure relief valve Apr. 18, 2006
6997206 Pressure Compensating valve Feb. 14, 2006
6959726 Valve assembly for attenuating bounce of hydraulically driven members of a machine Nov. 1, 2005
6832626 Modular two way check valve construction Dec. 21, 2004
6805154 Freeze protection device for wall hydrants/faucets Oct. 19, 2004
6789561 Excess-flow valve Sep. 14, 2004
6779554 Return check valve Aug. 24, 2004
6772790 Fuel tank Aug. 10, 2004
6712726 Lube regulated pressure regulator valve Mar. 30, 2004
6666656 Compressor apparatus Dec. 23, 2003
6648010 Check valve plate with anti-pressure surge device Nov. 18, 2003
6634375 Leak arresting valve Oct. 21, 2003
6578604 Ball valve with slot for continuous flow Jun. 17, 2003
6532986 Freeze protection device for wall hydrants/faucets Mar. 18, 2003
6488320 Quick connect coupling Dec. 3, 2002
6273128 Apparatus for controlling the flow of fluid Aug. 14, 2001
6196246 Freeze-resistant plumbing system in combination with a backflow preventer Mar. 6, 2001
6173734 Leak arresting mechanical flow control valve Jan. 16, 2001
6142980 Multi-function medical control valve assembly Nov. 7, 2000
6102072 Water-hammerless check valve Aug. 15, 2000
6089829 Pump for hot corrosive melts Jul. 18, 2000
6079449 System for delivering and maintaining the sterility and integrity of flowable materials Jun. 27, 2000

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