Expansible chamber devices – With cushioning means effective over a portion only of stroke
Patent
1979-01-05
1980-12-16
Hershkovitz, Abraham
Expansible chamber devices
With cushioning means effective over a portion only of stroke
92 94, 92100, 267165, F01B 1102
Patent
active
042389917
ABSTRACT:
A three-position actuator comprising a casing having a diaphragm dividing the casing into separate pressure chambers, an actuating rod connected to said diaphragm and resilient means urging said diaphragm in one direction. One of the resilient means comprise a movable spring seat with a compression spring interposed between the seat and a plate connected to the diaphragm. The seat and plate are in turn interconnected by a single flat connector strap limiting separation between the plate and diaphragm to an amount approximately one-half the total travel of the diaphragm. In one embodiment of the invention the spring seat is connected to a separate diaphragm. In the preferred embodiment of the invention, only a single diaphragm is employed and the spring seat floats in the casing, with its separation from the diaphragm limited by the connector strap.
REFERENCES:
patent: 2181954 (1939-12-01), Wallat
patent: 3194497 (1965-07-01), Thorburn
patent: 3230024 (1966-01-01), Gika
patent: 3648571 (1972-03-01), Burgess
patent: 3709461 (1973-01-01), Johnson
patent: 3737155 (1973-06-01), Karlan
Product Engineering, Jan. 2, 1961, p. 8.
Ferro Manufacturing Corporation
Hershkovitz Abraham
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