Fluid handling – Systems – Valves with separate – correlated – actuators
Patent
1981-09-10
1984-08-28
Rosenthal, Arnold
Fluid handling
Systems
Valves with separate, correlated, actuators
251 31, 251 634, 91426, 92151, 92152, E21B 4301, F16K 31143
Patent
active
044678339
ABSTRACT:
A control valve and a multiple control system therefor for controlling a plurality of remotely positioned hydraulically actuated underwater devices. The control valve includes first and second equal size pilot pistons acted upon by first and second pilot ports, respectively, for moving the valve to either an open or closed position, and third and fourth unequal size pilot pistons acted upon by third and fourth pilot ports for moving the valve to either an open or closed position. The control valve may be operated in an electro-hydraulic control mode by the use of electrically actuated valves controlling the supply of fluid to the first and second ports. In addition, the control valve can be operated in a hydraulic mode by hydraulically controlling the supply of fluid to the third and fourth pilot ports.
REFERENCES:
patent: 3547156 (1970-12-01), Cockeram
patent: 3650506 (1972-03-01), Bruton
patent: 3827668 (1974-08-01), De Vries et al.
patent: 3981478 (1976-09-01), Lundsgart
patent: 3993100 (1976-11-01), Pollard et al.
patent: 4010928 (1977-03-01), Smith
patent: 4029290 (1977-06-01), Karpenko
Angelo Lawrence F.
Satterwhite Lawrence E.
NL Industries Inc.
Rosenthal Arnold
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