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Class Information
Number: 137/527.4
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Pivoted valves > Valve head movably connected for accommodation to seat
Description: Devices in which the mounting of the valve permits motion of the valve head, in addition to pivoting, in order to allow the head to adjust itself to the valve seat.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8667794 Valve seat and gasket for exhaust bypass valve Mar. 11, 2014
8567435 Centreline flow valve Oct. 29, 2013
7673695 Dry pipe/deluge valve for automatic sprinkler systems Mar. 9, 2010
7585164 Backflow preventing apparatus for compressor Sep. 8, 2009
7559338 Keyless fire hydrant protection system Jul. 14, 2009
7458391 Assembling a siphonable filler tube with a check valve on a fuel tank Dec. 2, 2008
7426979 Exhaust gas control valve Sep. 23, 2008
7249611 Check valve Jul. 31, 2007
7195032 Unidirectional, adjustable flap valves Mar. 27, 2007
7152622 Check valve Dec. 26, 2006
7147001 Fuel-transfer system Dec. 12, 2006
7137405 Low pressure check valve Nov. 21, 2006
6901954 Safety relief valve Jun. 7, 2005
6694996 Swing check backflow preventor having check valve with lever arm Feb. 24, 2004
6668858 Check valve Dec. 30, 2003
6637449 Pressure sensible valve for exhaust muffler and method of assembling same Oct. 28, 2003
6581721 Valve for a control muffler Jun. 24, 2003
6273399 Air pressure stabilizer Aug. 14, 2001
6264452 Reinforcement pin for check valve Jul. 24, 2001
6247489 Check valve Jun. 19, 2001
6050293 Flapper check valve Apr. 18, 2000
6026853 Fuel tank filler neck check valve Feb. 22, 2000
5947152 Check valve and backflow preventer Sep. 7, 1999
5904338 Valve May. 18, 1999
5855224 Flapper check valve Jan. 5, 1999
5794655 Swing-type check valve assembly having an integrated valve seat and valve housing cover Aug. 18, 1998
5769116 Composite action type water-hammer-preventive check valve Jun. 23, 1998
5711341 Swing-type check valve assembly retained within a valve housing by abutting engagement with a valve cover and a port of the valve housing Jan. 27, 1998
5709240 Check valve and backflow preventer Jan. 20, 1998
5671769 Swing check valve and method for repairing same Sep. 30, 1997
5411056 Pressure relief valve May. 2, 1995
5381821 Fluid check valve with replaceable flapper assembly Jan. 17, 1995
5236007 Top-entry check valve having retainer ring Aug. 17, 1993
5191913 Top-entry check valve with pin fasteners Mar. 9, 1993
5161570 Top-entry check valve with threaded fasteners Nov. 10, 1992
5161566 Top-entry check valve with screw-in seat Nov. 10, 1992
5156182 Top-entry check valve with pin fasteners Oct. 20, 1992
5156183 Top-entry check valve having spring retainer Oct. 20, 1992
5010919 Subsea barrier valve Apr. 30, 1991
4872480 Swing check valve Oct. 10, 1989
4872478 Swing check valve Oct. 10, 1989
4872477 Swing check valve Oct. 10, 1989
4872479 Swing check valve Oct. 10, 1989
4860789 Swing check valve with hinge pin insert Aug. 29, 1989
4852607 Support for check valve disc Aug. 1, 1989
4813451 Swing check valve with removable cartridge Mar. 21, 1989
4809739 Check valve Mar. 7, 1989
4809738 Swing check valve Mar. 7, 1989
4800919 Flap gate assembly Jan. 31, 1989
4781212 Swing check valve with removable cage and disc Nov. 1, 1988

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