Damper frame construction

Details Damper frame construction Damper frame construction

1982-06-14

1984-05-08

Perham, Alfred C.

Static structures (e.g., buildings)

Openwork; e.g., truss, trellis, grille, screen, frame, or...

Outside corner or peripherally bordered

E04C 238

Patent

active

044466676

ABSTRACT:
A one-piece damper frame wherein transverse slots in a channel shaped longitudinal frame member permit the frame sections to be bent to define a frame opening and flanges integral with the channel are unsevered to provide continuous integrity throughout the frame perimeter. Tabs formed in the frame material by extensions of the transverse slots overlap the proximal frame section across the corner and are secured in a manner to rigidly hold the corners in their appropriate angled positions.

REFERENCES:
patent: 2219594 (1940-10-01), Lang
patent: 2241266 (1941-05-01), Mayne et al.
patent: 2952342 (1960-09-01), Schnittker
patent: 3348353 (1967-10-01), Cartagena
patent: 3854248 (1974-12-01), Dayus

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