Hydraulic valve actuator

Details Hydraulic valve actuator Hydraulic valve actuator

1976-03-25

1977-10-04

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Apparatus having means responsive to or ameliorating the...

60416, 60DIG4, 91420, 137112, F15B 102, F15B 2000

Patent

active

040516768

ABSTRACT:
An emergency hydraulic ram valve actuator having redundant power sources and controls. At least two pressure fluid sources, such as hydraulic accumulators, are connected through separate controls to the cylinder head. Check valves in the cylinder head and base prevent outward flow to insure containment of the fluid even when dismantled for service. Both sets of controls are contained in manifolds connected between the pressure sources and pressure and exhaust lines to and from the cylinder. Flow from each accumulator is normally prevented by a pilot check valve, but selectively operated valves initiate flow which, in turn, biases the pilot check valves to full flow. As full flow commences a portion thereof is diverted to open the exhaust pilot check valves which allow cylinder evacuation. In the event one power and/or control system is disabled, the other will function independently. The pressure and exhaust lines are contained within protective shields throughout their lengths.

REFERENCES:
patent: 2396984 (1946-03-01), Broadston et al.
patent: 2618243 (1952-11-01), Treganowan
patent: 3513751 (1970-05-01), Escobosa
patent: 3680311 (1972-08-01), Harbonn et al.

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