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Class Information
Number: 137/512
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Plural
Description: Apparatus including more than one valve of the type.










Sub-classes under this class:

Class Number Class Name Patents
137/512.3 Diverse types 152
137/512.1 Dividing and recombining in a single flow path 289
137/512.4 Integral resilient member forms plural valves 141
137/513 Mechanically interconnected 38
137/512.2 One valve carries head and seat for second valve 85
137/512.5 With common biasing means 53


Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8701723 Filler coupling and corresponding receptacle and filling method Apr. 22, 2014
8640725 Connector for transferring fluid and method of use Feb. 4, 2014
8636025 Apparatus and methods to dispense fluid from a bank of containers and to refill same Jan. 28, 2014
8631801 Pressure regulating systems for expandable insertion devices Jan. 21, 2014
8539976 Back pressure valve with double barrier sealing Sep. 24, 2013
8528592 Check valve construction Sep. 10, 2013
8408482 Sprinkler with pressure regulation Apr. 2, 2013
8387655 Slurry flow control device Mar. 5, 2013
8297957 Compressor Oct. 30, 2012
8240330 Squeeze film damper valve for compressor cylinders Aug. 14, 2012
8230875 Check valve Jul. 31, 2012
8215339 Vapor barrier with valve for a building Jul. 10, 2012
8205639 Valve sealant fitting Jun. 26, 2012
8172554 Chemical liquid supplying apparatus May. 8, 2012
8147226 Valve assembly for pressure washer pump Apr. 3, 2012
8147227 Valve guide and spring retainer assemblies Apr. 3, 2012
8136544 Sealing arrangement with a segmented seal and pressure relief Mar. 20, 2012
8132558 Common rail fuel pump with combined discharge and overpressure relief valves Mar. 13, 2012
8074679 Y-type fluid end with replaceable suction module Dec. 13, 2011
8069950 Environmental compressor protection assembly Dec. 6, 2011
8069875 Ventilation member, ventilation member kit, and vented housing and vented tank using them Dec. 6, 2011
8056156 Vacuum relief unit and method for a pool Nov. 15, 2011
7967027 Simple diverter valve for a roman tub with replaceable cartridge including at least two checks Jun. 28, 2011
7931817 Additive dispensing device and a thermally activated additive dispensing filter having the additive dispensing device Apr. 26, 2011
7909056 Connector for transferring fluid and method of use Mar. 22, 2011
7784483 Backflow preventer Aug. 31, 2010
7740023 Check valve assemblies and related methods Jun. 22, 2010
7687171 Multi-stage in-line cartridge ejector for fuel cell system Mar. 30, 2010
7637279 Shuttle valve Dec. 29, 2009
7600530 Connector with check valve and method of use Oct. 13, 2009
7581559 Check valve for a fluid administration system Sep. 1, 2009
7565744 Method of manufacturing a micropump check valve Jul. 28, 2009
7513759 Valve guide and spring retainer assemblies Apr. 7, 2009
7395790 Reed valve breather for evolution engine Jul. 8, 2008
7341435 Fluid end Mar. 11, 2008
7334603 Check valve Feb. 26, 2008
7335002 Fluid end Feb. 26, 2008
7299815 Micropump check valve device and method of manufacturing the same Nov. 27, 2007
7296591 Valve arrangement for reciprocating machinery such as a pump and an compressor Nov. 20, 2007
7293576 Single-piece manifold with reduced pressure arrangement Nov. 13, 2007
7185671 Angled dual check valve Mar. 6, 2007
7178552 Valve Feb. 20, 2007
7140388 Dual ball valve air vent valve Nov. 28, 2006
7128088 Backflow preventer Oct. 31, 2006
7104276 Valve with reversible valve seat for high-pressure pump (HP) Sep. 12, 2006
7083400 Valve arrangement for a small hermetic compressor Aug. 1, 2006
7082958 Air valve for inflatable bladder Aug. 1, 2006
7077157 Spring-loaded pressure relief valve, particularly for containers of pressurized fluids Jul. 18, 2006
7059499 Fluid-dispensing pump and container provided therewith Jun. 13, 2006
7059340 Valve assembly for pipe disconnectors Jun. 13, 2006

1 2 3 4 5 6










 
 
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