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Class Information
Number: 137/527.8
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Pivoted valves > Weight biased
Description: Devices which are provided with means having sufficient mass to maintain the valve in the desired position in response to gravity.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8561642 Check valve for transport and storage containers for fluids Oct. 22, 2013
8517052 Pressurized vapor cycle liquid distillation Aug. 27, 2013
8511338 Water flow detection device Aug. 20, 2013
8490648 Check valve Jul. 23, 2013
8443833 Check valve May. 21, 2013
8443834 Nozzle check valve May. 21, 2013
8317158 Valve assemblies including corrugated flowbody and method for the manufacture thereof Nov. 27, 2012
8316876 Flushing device with removable drain ring for potable water systems Nov. 27, 2012
8302623 Anti-backflow insert for a fire hydrant outlet Nov. 6, 2012
8256454 Dynamic flapper and method Sep. 4, 2012
8196600 High-temperature jointed assemblies and wear-resistant coating systems therefor Jun. 12, 2012
8096318 Valve flap for a plumbing valve Jan. 17, 2012
8028715 Check valve for vacuum sewage pipe and vacuum sewage system Oct. 4, 2011
7874307 Check valve and method of use Jan. 25, 2011
7814983 Dry pipe valve for fire protection sprinkler system Oct. 19, 2010
7770511 Method and device for preparing liquid Aug. 10, 2010
7730679 Drain for a door or window sash or frame Jun. 8, 2010
7686031 Hydrant shoe with backflow prevention assembly Mar. 30, 2010
7585164 Backflow preventing apparatus for compressor Sep. 8, 2009
7575019 Faucet with water temperature retaining feature Aug. 18, 2009
7520294 Hydrant shoe with backflow prevention assembly Apr. 21, 2009
7444828 Ice discharging structure of ice making mechanism Nov. 4, 2008
7322423 Dry pipe valve for fire protection sprinkler system Jan. 29, 2008
7302967 Reverse flow preventing device and electronic apparatus Dec. 4, 2007
7249611 Check valve Jul. 31, 2007
7152622 Check valve Dec. 26, 2006
7134448 Transducer for monitoring the position of a movable body Nov. 14, 2006
7108010 Check valve position detector Sep. 19, 2006
7104333 Dry pipe valve for fire protection sprinkler system Sep. 12, 2006
7025086 Reverse flow preventing device and electronic apparatus Apr. 11, 2006
7004194 Check valve with pressure relief feature Feb. 28, 2006
6971398 Hydrodynamic-force-responsive baffle for liquid treatment basin Dec. 6, 2005
6848468 Drain cover assembly Feb. 1, 2005
6830065 Duct connector apparatus and method Dec. 14, 2004
6823905 Inflation valve assembly for a dunnage or cargo air bag Nov. 30, 2004
6810963 Dry pipe valve for fire protection sprinkler system Nov. 2, 2004
6789568 Fluid flow control mechansim Sep. 14, 2004
6782916 Flapper valve system Aug. 31, 2004
6691736 Waterproof valve of exhausting tube Feb. 17, 2004
6685557 Building ventilation air inlet assembly Feb. 3, 2004
6557645 Dry pipe valve for fire protection sprinkler system May. 6, 2003
6543474 Pressure equalizing check valve Apr. 8, 2003
6508246 Mechanical draft controller Jan. 21, 2003
6499503 Backflow valve Dec. 31, 2002
6475078 Air ventilating device Nov. 5, 2002
6328052 Bidirectional check valve Dec. 11, 2001
6318403 Combination manifold and check valve for a water heater Nov. 20, 2001
6269800 Device for feeding fuel Aug. 7, 2001
6264452 Reinforcement pin for check valve Jul. 24, 2001
6220282 Backflow prevention apparatus Apr. 24, 2001

1 2 3 4 5 6










 
 
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