Automatic valve actuator

Details Automatic valve actuator Automatic valve actuator

1988-08-19

1989-04-04

Chambers, A. Michael

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

251 67, 251313, F16K 508

Patent

active

048176583

ABSTRACT:
A valve actuator (A, B) for automatic actuation of a rotary valve mechanism (V, V') in response to a specific exigency, such as fire. The actuator includes a housing (13) affixed in relation to the valve, having a spiral torsion spring (11, 11'). A spring coupling (20) is connected to the spring for being rotatably driven for actuation thereby of the valve mechanism (41, 61) when released. An arm (6) having a camming surface (32') operatively prevents rotation of the coupling until released. A releasable link (L) secures the arm against releasing movement. The coupling is operatively connected to a shaft (40) of the valve mechanism and mating elements (26, 27) carried by the coupling and the housing respectively lockingly interengage the coupling and housing upon actuation such that the valve mechanism is precluded from rotating in a direction contrary to the actuation direction upon actuation.

REFERENCES:
patent: 1897000 (1933-02-01), Biery
patent: 3538929 (1970-11-01), Bothin
patent: 4275754 (1981-06-01), Lyons
patent: 4503717 (1985-03-01), Keller et al.
patent: 4533114 (1985-08-01), Cory et al.

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