Valves and valve actuation – Biased trip – With second diverse control
Patent
1983-02-08
1985-08-06
Scott, Samuel
Valves and valve actuation
Biased trip
With second diverse control
251 74, 2512495, 137 75, 74406, F16K 3144
Patent
active
045331146
ABSTRACT:
An actuator for a rotary valve includes a fail-safe mechanism for automatically opening or closing the valve upon the occurrence of a predetermined condition. The actuator also includes a mechanism for permitting the manual operation of the valve from the open to closed position, and vice versa, and to a continuum of positions between the open and closed positions even when the fail-safe mechanism is activated. A biased clutch activates the fail-safe mechanism and also couples a worm-gear drive for effecting the manual operation of the valve.
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Posi-Seal International, Inc. "Posi-Seal High Performance Trunnion Valves", p. 4, .COPYRGT.1980.
Posi-Seal International, Inc., "Don't Get Burned With an Unsafe, Fire Safe Valve", p. 4, .COPYRGT.1980.
Babcock Jon A.
Cory John M.
Pupillo Andrew
Varney Edward W.
Kamen Noah
Posi-Seal International, Inc.
Scott Samuel
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