Expansible chamber devices – With releasable stop or latch means to prevent movement of... – Means includes element interfitting between working member...
Patent
1979-10-01
1981-04-28
Hershkovitz, Abraham
Expansible chamber devices
With releasable stop or latch means to prevent movement of...
Means includes element interfitting between working member...
137 75, 169 42, 236DIG5, F15B 1526
Patent
active
042638399
ABSTRACT:
A heat sensitive locking device is preferably provided for a fluid actuator of the type which is moved in a direction to one position through the application of fluid pressure and remains in such position unless temperature conditions surrounding the device reach a level indicating that the actuator should be shifted to another position. The locking device comprises a core attachable to an exposed end of, for example, the piston shaft, and an annular collar surrounding such core and attached to the cylinder. A plurality of annular segmental shaped locking members are disposed between the core and collar and pivotally mounted so as to be movable to a locking position or to an unlocked position, each relative to the core. The annular locking elements are held in their locking position by being wrapped by a resilient spring wire, the ends of which are anchored to the locking members by means including a minimal size fusible link.
REFERENCES:
patent: 1248861 (1917-12-01), Holloway
patent: 1332283 (1920-03-01), Bancroft
patent: 3169008 (1965-02-01), Whitlock
patent: 3180524 (1965-04-01), Shepard
patent: 3424403 (1969-01-01), Hull
patent: 3659624 (1972-05-01), Kelly
patent: 3826313 (1974-07-01), Yao
Akkerman Neil H.
Goans Kip B.
Baker CAC, Inc.
Hershkovitz Abraham
Norvell, Jr. William C.
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