Hydraulically operated shutoff valve

Details Hydraulically operated shutoff valve Hydraulically operated shutoff valve

1976-12-09

1979-02-27

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

With mechanical movement between actuator and valve

60413, 251280, F16K 31124

Patent

active

041415337

ABSTRACT:
A fast closing shutoff valve having a self-contained hydraulic actuating system and an emergency pneumatic back-up system. The hydraulic system includes an accumulator for a high closing rate with a minimum size pump. The actuating system operates through a toggle linkage to reduce valve rate as valve nears closed position to reduce impact loads and increase closing pressure.

REFERENCES:
patent: 760595 (1904-05-01), Wiesebrock
patent: 2392471 (1946-01-01), Fox
patent: 2674092 (1954-04-01), Gardiner
patent: 2708344 (1955-05-01), Greer
patent: 2741478 (1956-04-01), Mercier
patent: 2954960 (1960-10-01), Dunbar et al.
patent: 3225544 (1965-12-01), Lemley
patent: 3329403 (1967-07-01), Juds
patent: 3436913 (1969-04-01), Muller et al.
patent: 3593824 (1971-07-01), Gregory
patent: 3730214 (1973-05-01), Brumm

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