F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
137/56
F16K 1/20 (2006.01) F16F 9/14 (2006.01) F16K 17/18 (2006.01)
Patent
CA 1138742
ABSTRACT DUAL ACTING CHECK VALVE DAMPENER A dampener arrangement for a check valve having a casing defining a flow path through the check valve and having a clapper mounted on a valve shaft for opening and closing movement out of and into the flow path. The dampener arrangement comprises a fluid tight housing for mounting relatively to such a check valve casing, the housing defining a cavity therein for receiving a damping fluid, a rotor positioned in the housing for connection to such a valve shaft for movement therewith, the rotor having a vane extending therefrom to subdivide the cavity into first and second fluid volumes, the vane being dis- placeable within the cavity through damping fluid in the cavity in first and second directions in accordance with opening and closing movements of such a clapper valve shaft to which the rotor is connected, the movement of such a clapper being adapted to be retarded by movement of the vane through damping fluid in the cavity increasing the pressure of damping fluid disposed in the fluid volume forward of the vane in the direction of movement thereof, and a pressure relief arrangement disposed within the rotor and communicable with the first and second fluid volumes to relieve pressure generated in damping fluid in the volumes forward of the vane in the direction of movement when such fluid pressure exceeds a predetermined pressure by venting that volume to the other of the fluid volumes.
362972
George H. Riches And Associates
Geosource Inc.
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