Fluid operated, axially reciprocating actuator

Details Fluid operated, axially reciprocating actuator Fluid operated, axially reciprocating actuator

1984-09-14

1985-05-28

Scott, Samuel

Valves and valve actuation

Blow-out preventers

251 94, 92 24, 92 27, E21B 3306

Patent

active

045195714

ABSTRACT:
There is disclosed a blowout preventer having rams each of which is moved between opened and closed positions by a fluid-operated actuator having a rod adapted to be axially reciprocated by piston means within a cylinder and extending from the cylinder for connection to the ram, means for locking the rams in closed position including locking elements carried by the rod for movement into locking position within the cylinder automatically in response to movement of the ram with the rod into closed position.

REFERENCES:
patent: 3420144 (1969-01-01), Berry
patent: 3918346 (1975-11-01), Ziegler
patent: 3941141 (1976-03-01), Robert
patent: 4052995 (1977-10-01), Ellison
patent: 4305565 (1981-12-01), Abbe

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