Compact fluid powered actuator

Details Compact fluid powered actuator Compact fluid powered actuator

1988-07-05

1989-10-24

Garrett, Robert E.

Expansible chamber devices

With separate biasing means for working member

92130D, 92140, 74107, 74110, 74569, F01B 900

Patent

active

048754048

ABSTRACT:
A fluid actuator having a piston, a pair of springs, a pair of cams, and a pair of cam followers mounted in a housing. A normally open valve is coupled to the actuator output shaft for actuation. When fluid pressure is applied to the piston, the springs are compressed, and the cam followers are moved down to permit the cams to rotate away from each other, thereby reducing the force on the actuator output shaft and permitting the valve to open. When fluid pressure is removed from the piston, the springs expand pushing the piston and the cam followers up, thereby rotating the cams toward each other and forcing the actuator output shaft against the valve stem to close the valve.

REFERENCES:
patent: 1513424 (1924-10-01), Richards
patent: 2165985 (1939-07-01), Schweintler
patent: 2829500 (1958-04-01), Butler
patent: 2897784 (1959-08-01), Harper
patent: 2908478 (1959-10-01), Starrett
patent: 3416635 (1968-12-01), Salton
patent: 4401010 (1983-08-01), Eddington et al.
patent: 4549719 (1985-10-01), Baumann

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