Method of forming a smoke, fire and air control damper with stam

Details Method of forming a smoke, fire and air control damper with stam Method of forming a smoke, fire and air control damper with stam

1978-05-12

1980-01-15

Crane, Daniel C.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29434, 113116AA, B23P 1500, F16K 2700, F24F 1314

Patent

active

041831292

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: 1368453 (1921-02-01), Ream
patent: 2759573 (1956-08-01), Schwab
patent: 3273632 (1966-09-01), McCabe
patent: 3381601 (1968-05-01), McCabe
patent: 3543439 (1970-12-01), Pantland
patent: 3581650 (1971-06-01), McCabe
patent: 3833989 (1974-09-01), McCabe
patent: 3908529 (1975-09-01), McCabe

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