Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1998-05-26
1999-06-08
Ferensic, Denise L.
Fluid handling
Line condition change responsive valves
Direct response valves
1375276, 13751629, F16K 1500
Patent
active
059097485
ABSTRACT:
The present invention, a pressure relief valve includes a valve body having, a valve seat and a flap valve pivotally mounted on said valve body, wherein said flap valve sealably co-operates with said valve seat in a closed position thereby sealing off said pressure relief valve, wherein the valve flap pivots about a pivot axis between a closed position and fully opened position. The pressure relief valve also includes a coil spring operably connected to said flap valve for applying a continuously increasing spring force as said valve pivots from the closed position to the fully opened position. The pressure relief valve further includes a pivot arm rigidly connected to said flap valve at one end and pivotally connected to a link arm at the other end, wherein said link arm is operably connected to said springs, such that the biasing force of the springs is communicated to the flap vale through said link arm and said pivot arm. Wherein, the linkage is adapted to enable the valve closing force to be preselected according the position of the flap valve, such that the valve closing force is a function of valve position.
REFERENCES:
patent: 3438391 (1969-04-01), Yocum
patent: 4595032 (1986-06-01), Banks
patent: 5205125 (1993-04-01), Potter
Ferensic Denise L.
Kim Joanne Y.
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