Fluid motor actuator with compression spring fail-safe mechanism

Details Fluid motor actuator with compression spring fail-safe mechanism Fluid motor actuator with compression spring fail-safe mechanism

1988-06-20

1989-12-05

Garrett, Robert E.

Expansible chamber devices

With separate biasing means for working member

92130D, 92131, 92136, F01G 904

Patent

active

048844950

ABSTRACT:
A fluid motor actuator of the type in which an actuator member is moved in either one of two opposite directions from a rest position to an actuated position includes a fail-safe mechanism having compression springs coupled with the actuator member for compression of the compression springs in response to actuation of the actuator member in either of the two opposite directions for establishing a restoring force which, upon loss of motive power, will return the actuator member to the rest position and maintain the actuator member in the rest position pending restoration of motive power.

REFERENCES:
patent: 2379306 (1945-06-01), Larson et al.
patent: 3537355 (1970-11-01), Bliss
patent: 3991661 (1976-11-01), Mocha
patent: 4354424 (1982-10-01), Nordlund
patent: 4478240 (1984-10-01), Tanner
patent: 4585024 (1986-04-01), Esseniyi

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