Fluid control circuit and method of operating pressure responsiv

Details Fluid control circuit and method of operating pressure responsiv Fluid control circuit and method of operating pressure responsiv

1988-12-20

1990-09-11

Look, Edward K.

Power plants

Pressure fluid source and motor

Apparatus having means responsive to or ameliorating the...

60413, 60416, 137 1, 91 29, 91 32, 91 33, 91418, 91420, F16D 3102

Patent

active

049551957

ABSTRACT:
A fluid control circuit and method of operating equipment such as a blowout preventer having a two-way hydraulic piston and cylinder assembly. The circuit includes various features such as a dual pressure level independently controlled fluid supply, a dedicated secondary fluid supply reserved for supplemental use, a dedicated fluid supply reserved for exclusive use in one operating branch, automatic sensor for applying a reserve fluid supply on a sensed demand, a pressure intensifier for increasing available operating force, and control circuitry for preventing loss of enhanced secondary operating energy into a primary circuit.

REFERENCES:
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patent: 4349041 (1982-09-01), Bates
patent: 4413642 (1983-11-01), Smith et al.
patent: 4509405 (1985-04-01), Bates
patent: 4614148 (1986-09-01), Bates

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