Expansible chamber devices – Oscillating working member or cylinder therefor
Patent
1993-06-14
1995-02-07
Denion, Thomas E.
Expansible chamber devices
Oscillating working member or cylinder therefor
92124, 92130R, 251 59, 251292, F01C 900
Patent
active
053867610
ABSTRACT:
A valve actuator with an arcuate piston disposed within a housing including a side wall having a partition and two end plates whereby when joined, the housing forms a first and a second compartment. An arcuate piston travels between the compartments via an opening in the partition in an oscillating manner. A removable piston assembly enables removing the arcuate piston, output shaft and lever arms supporting the piston in order to remove the output shaft or to engage a spiral spring connecting the output shaft with the housing. The spiral spring may be pretensioned by winding before inserting the piston assembly into the housing. Fluid pressure applied to either compartment urges movement of the arcuate piston into the opposite compartment.
REFERENCES:
patent: 1077884 (1913-11-01), Kinney
patent: 2741702 (1956-04-01), Keen
patent: 3110228 (1963-11-01), Shramo et al.
patent: 3444788 (1969-05-01), Sneen
patent: 4628797 (1986-12-01), Kendall
patent: 5007330 (1991-04-01), Scobie et al.
patent: 5044257 (1991-09-01), Scobie
patent: 5101862 (1992-04-01), Leete
Denion Thomas E.
Savings by Design, Inc.
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