초록 ▼

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

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.

대표청구항 ▼

An air return filter grille assembly comprising: a molded fiberglass plenum having an open side surrounded by a skirt; a filter receiving recess formed in said molded fiberglass plenum for receiving a filter; a perforated face plate fitting the open side of said plenum; separable hinge means hingedl

An air return filter grille assembly comprising: a molded fiberglass plenum having an open side surrounded by a skirt; a filter receiving recess formed in said molded fiberglass plenum for receiving a filter; a perforated face plate fitting the open side of said plenum; separable hinge means hingedly mounting said perforated face plate on said fiberglass plenum so that said perforated face plate can be easily swung open to allow access to the interior of said molded fiberglass plenum; latch means on said perforated face plate for holding said face plate in a closed position against said open side of said molded fiberglass plenum; said separable hinge means comprised of a split hinge, one half of said hinge having a socket and a mating half of said hinge having a pin; one half of said hinge being secured to said molded fiberglass plenum and the other half of said hinge being secured to said interchangeable perforated face plate; whereby said molded fiberglass plenum may be used as an air return filter grille assembly or air diffusing supply grille assembly by removing and changing said interchangeable perforated face plate.