Smoke, fire and air control damper

Details Smoke, fire and air control damper Smoke, fire and air control damper

1977-02-24

1978-03-28

Nilson, Robert G.

Fluid handling

Ambient condition change responsive

Atmospheric

49 2, 98110, 137601, 160 6, 236 49, E05F 1520, F24F 1314, F16K 122

Patent

active

040809781

ABSTRACT:
A rotating blade, smoke, fire and air control damper with spring closures attached on both inside and outside surfaces of the blades is disclosed. The spring closures cooperate with a bimetallic heat sensing device to trigger the closing of the blades at a predetermined temperature.

REFERENCES:
patent: 3260018 (1966-07-01), Schuh
patent: 3312159 (1967-04-01), Shepard
patent: 3889314 (1975-06-01), McCabe
patent: 3960065 (1976-06-01), McCabe
patent: 3996952 (1976-12-01), Root

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