Dual purpose attic fan

Claim 1

A dual purpose attic ventilator comprising: a) a hatch comprising a rectangular box shaped frame forming a rectangular opening and having a vertically extending lip lining said opening; b) means for mounting said hatch on a roof of an attic in a building having an opening therethrough permitting communication with the interior of said attic through said hatch; c) attic fan means comprising a box shaped base sized and shaped to fit on said box shaped frame of said hatch with said base having a rectangular bottom flange surrounding and adjacent said vertically extending lip and in contact with said box shaped frame; d) hinge means along one common edge of each of said box shaped frame and box shaped base for pivoting said attic fan means on said hatch, so that a person can open said attic fan means on said hatch to climb out through said hatch onto the roof of the building and can close said attic fan means on said hatch, to allow said attic fan means to pull hot air out of the attic through said hatch; e) said attic fan means further comprising means forming a circular aperture, a bracket support within said circular aperture, disc-type motor means having fan blades secured centrally to and downstream from said bracket support for circulating air out from said attic, and a hood assembly affixed to said box shaped cabinet over the central circular aperture to direct the air being circulated by said fan blades; f) means comprising a gasket mounted on said frame means for sealing said attic fan means on said hatch when said attic fan means is in the closed position; g) means for locking said attic fan means from the inside when in the closed position comprising a latch mechanism mounted on said frame and box means in the rectangular opening.