Molded fiberglass air return filter grille

Details Molded fiberglass air return filter grille Molded fiberglass air return filter grille

1987-12-03

1989-01-31

Hart, Charles

Gas separation

Combined or convertible

55493, 55494, 55480, 55504, 55DIG31, B01D 4610

Patent

active

048013161

ABSTRACT:
An air return filter or air supply grille assembly having an interchangeable perforated face plate hingedly attached directly to a molded fiberglass plenum. The molded fiberglass plenum has a preformed recess for receiving and positioning a filter resting on the face plate when used as an air return filter grille assembly. The hinge system for the interchangeable perforated face plate is comprised of a pair of mating half hinges with one half secured to the plenum and the other half secured to each interchangeable face plate. The grille assembly can be mounted and a perforated face plate selected to provide an air return filter grille assembly or an air diffusing supply grille assembly. The air filter grille assembly is constructed to mount easily on T-bar suspended ceilings with the perforated face plate held closed by manually rotatable pawls.

REFERENCES:
patent: 3003581 (1961-10-01), Mreson
patent: 3360910 (1968-01-01), Soltis
patent: 3570220 (1971-03-01), Felter
patent: 3782082 (1974-01-01), Smith et al.
patent: 3823926 (1974-07-01), Bracich
patent: 4088463 (1978-05-01), Smith
patent: 4266470 (1981-05-01), Schroeder et al.
patent: 4371386 (1983-02-01), De Vecchi

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