Safety system for a double acting servomotor

Details Safety system for a double acting servomotor Safety system for a double acting servomotor

1980-06-06

1982-07-06

Cohen, Irwin C.

Motors: expansible chamber type

With motive fluid valve

Independent control of bypass between opposed working chambers

91437, 251 26, F15B 13042, F15B 13043

Patent

active

043376894

ABSTRACT:
The safety system employs a shut-off valve, a control valve and a selector. The selector is formed of two non-return valves which are connected to the two chambers of the servomotor and has an output connected to one chamber of the control valve. Another chamber of the control valve is connected to the low pressure chamber of the servomotor while the intermediate chamber is connected to the shut-off valve in order to influence the movements of the piston of the shut-off valve. A solenoid actuates the control valve to deliver either high pressure fluid from the high pressure servomotor chamber or low pressure fluid from the low pressure servomotor chamber to the shut-off valve.

REFERENCES:
patent: 2219967 (1940-10-01), Thiry
patent: 3127688 (1964-04-01), Hein et al.
patent: 3709103 (1973-01-01), Dukhovny et al.
patent: 3757646 (1973-09-01), Rohner
patent: 3943825 (1976-03-01), Bianchetta et al.

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