초록 ▼

A fan housing assembly includes a fan and an air permeable, decorative grill mounted on a U-shaped bracket in a housing and two rotatably mounted, semi-circular damper plates in said housing, said plates being movable by air blown by said fan between a normal horizontal position blocking the air dis

A fan housing assembly includes a fan and an air permeable, decorative grill mounted on a U-shaped bracket in a housing and two rotatably mounted, semi-circular damper plates in said housing, said plates being movable by air blown by said fan between a normal horizontal position blocking the air discharge opening of said housing and a vertical position not blocking said opening; and a mounting device for said housing, said mounting device being rigidly affixed to a support member and being adapted to extend through an opening in the wall of said housing for engagement with and support of said housing.

대표청구항 ▼

A fan housing assembly for attachment to a supporting structure of an enclosure to be exhausted comprising: (a) a fan housing comprising a generally cylindrical hollow casing which includes openings at its two ends and means securing said casing to said supporting structure, said casing being vertic

A fan housing assembly for attachment to a supporting structure of an enclosure to be exhausted comprising: (a) a fan housing comprising a generally cylindrical hollow casing which includes openings at its two ends and means securing said casing to said supporting structure, said casing being vertically positioned on said supporting structure, with the opening at its lower end serving as an air intake opening and the opening at its upper end serving as an air discharge opening, (b) a blower means for drawing air from said enclosure and blowing the same through said casing to the outside thereof, (c) an air permeable, decorative grill covering said air intake opening of said casing, (d) support means for said blower means and said decorative grill, and (e) a damper member comprising two semicircular plates having their straight edges closely adjacent one another and disposed to either side of a diametrical plane through said casing, each of said plates being rotatably mounted in the top portion of said casing by means of two half-cylindrical tabs projecting from the two opposite ends of its straight edge through cooperating apertures in said casing wall, said cooperating apertures being not fully circular holes, said plates being supported in a generally horizontal position blocking said air discharge opening of said casing with the flat diametrical surface of each of said tabs in a generally horizontal position, and being rotatable by air blown through said casing to a generally vertical position not blocking said air discharge opening, wherein said flat surface of each of said tabs assumes a generally vertical position, said plates being normally biased to said generally horizontal blocking position.