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Class Information
Number: 137/858
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Resilient material valve > With valve member flexing about securement > Flap or reed > With weight
Description: Valve which, in addition to the restoring force of the resilient material is provided with a mass of material which due to the force of gravity acts to bias the resilient member towards its valve seat.

Patents under this class:

Patent Number Title Of Patent Date Issued
7556559 Control and pressure release valve Jul. 7, 2009
6592346 Compressor discharge valve Jul. 15, 2003
6468148 Exhaust ventilator Oct. 22, 2002
5848615 Check valve cartridge for fluid pump Dec. 15, 1998
5500663 Recording ink container with an air vent valve Mar. 19, 1996
5364244 Pump arrangement including flag type inlet valves with spherical seating Nov. 15, 1994
5355910 Dual component flap Oct. 18, 1994
5285816 One way valve Feb. 15, 1994
4702274 Quick disconnect for sewage system Oct. 27, 1987

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