Single-effect submarine actuator for operating valves

Details Single-effect submarine actuator for operating valves Single-effect submarine actuator for operating valves

2008-07-22

2008-07-22

Yu, Justine R. (Department: 3751)

Valves and valve actuation

Fluid actuated or retarded

Fluid and non-fluid actuators

C251S058000, C251S062000, C251S250000

Reexamination Certificate

active

10877086

ABSTRACT:
The invention relates to the field of the submarine valve actuators, and specifically to those actuators, that in order to effect a standard valve closing operation are connected to an oleo system feeding an hydraulic cylinder (1), whose plunger (3), by a mechanical link, operates the valve and compresses a spring (8) which provides for the standard opening operation. Said actuators are provided with an input shaft (21) for connectin a ROV for valve opening and closing operations when there is a failure in the oleo system. The connection between the ROV-operated input shaft (21) and the mechanical link between the piston (3) and the spring (8) is carried out by a planetary gear reducer (15).

REFERENCES:
patent: 2408338 (1946-09-01), Parsons
patent: 4034958 (1977-07-01), Masclet
patent: 4346728 (1982-08-01), Sulzer
patent: 5488896 (1996-02-01), Current
patent: 195 43 237 (1997-05-01), None
patent: 0 434 935 (1991-07-01), None

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