Smoke, fire and air control damper with stamped blade

Details Smoke, fire and air control damper with stamped blade Smoke, fire and air control damper with stamped blade

1976-10-04

1978-09-12

Nilson, Robert G.

Valves and valve actuation

Rotary valves

Butterfly

98113, 137601, F24F 1314, F16K 122

Patent

active

041132327

ABSTRACT:
A novel smoke, fire or air control damper is disclosed wherein a frame with an inwardly depending flange is articulated to at least one rotating blade by integrally formed hook-shaped hinge elements and hinge portions which are stamped in the blade and flange respectively. This novel hinging relationship simplifies the material and construction required to form the damper, and more particularly, the blade of the damper, while providing a blade configuration which overlaps appropriate portions of the flange to form a seal between the overlapping portions of parallel offset blade portions and the appropriate opposite services of the frame flange, when the blade is in the closed position.

REFERENCES:
patent: 3381601 (1968-05-01), McCabe
patent: 3581650 (1971-06-01), McCabe
patent: 3833989 (1974-09-01), McCabe
patent: 3908529 (1975-09-01), McCabe

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