Spring-powered actuator

Details Spring-powered actuator Spring-powered actuator

1982-11-09

1985-07-30

Chambers, A. Michael

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

137556, 137601, 49 7, 49 8, E05F 1520

Patent

active

045315345

ABSTRACT:
A spring-powered actuator especially for operating devices such as fire and/or smoke dampers, doors, hatches, vents, traps, valves and other devices having components which are movable between at least two positions. The spring-powered actuator of the invention comprises a longitudinally-displaceable re-wind screw which is rotatable to recharge the spring of the actuator, and a tilting element on the screw which is mounted for tilting movement with respect to the screw axis to allow longitudinal movement of the re-wind screw so as to permit rapid and reliable release of energy stored in the spring. When used in a combination fire and smoke damper, it thus opens or closes the blades of the latter.

REFERENCES:
patent: 3323438 (1967-06-01), Korff
patent: 3830016 (1974-08-01), Levine
patent: 4184288 (1980-01-01), Magill et al.
patent: 4304248 (1981-12-01), Magill
patent: 4333489 (1982-06-01), Magill et al.

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