Control system for gate-valves

Details Control system for gate-valves Control system for gate-valves

1974-12-11

1977-06-14

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

With mechanical movement between actuator and valve

92 65, 92 75, 251279, 251326, F16K 31122

Patent

active

040292894

ABSTRACT:
This invention concerns a control system for automatic safety gate-valves.
The system comprises two hydraulically controlled pistons, the rod axis of which is parallel to the axis of the valve passage, and a connection by equal connecting rods, symmetrical to the axis of the gate-rod, between each of the piston rods and the gate-rod, with a release spring exerting a force contrary to the opening force acting on each piston.
This system is specially designed for automatic gate-valves for oil installations.

REFERENCES:
patent: 296944 (1884-04-01), Field
patent: 306930 (1884-10-01), Kane
patent: 363643 (1887-05-01), Jacobs
patent: 677940 (1901-07-01), Carr
patent: 872369 (1907-12-01), Rankin
patent: 1532029 (1925-03-01), Bobbitt
patent: 1819875 (1931-08-01), Cunningham
patent: 2004717 (1935-06-01), Thwaits
patent: 2042906 (1936-06-01), McElwaine
patent: 2358186 (1944-09-01), Pond
patent: 2387912 (1945-10-01), Kelly
patent: 2503469 (1950-04-01), Caldwell
patent: 3063423 (1962-11-01), Riordan
patent: 3684237 (1972-08-01), Hyde et al.
patent: 3854500 (1974-12-01), Cooper

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