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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||98/421 ; 98/4208 ; 98/116|
|발명자 / 주소||
|출원인 / 주소||
|인용정보||피인용 횟수 : 40 인용 특허 : 2|
A ventilation fan structure has a fan blade-motor portion and a shroud portion independently affixable to the ceiling to reduce noise levels, improve aerodynamic efficiency, and facilitate installation. A mounting member is affixable to ceiling joists, one of which spans an opening in the ceiling for the fan structure. The drive motor and associated fan blades are mounted on the mounting member. The shroud surrounds the ceiling opening and embraces the fan blades. The mounting member extends through the shroud in its attachment to the joists.
A ventilation fan structure positionable across an opening in a bulding member having a pair of structural elements, one of which extends across the opening, the other of which does not, said fan structure comprising: a mounting member spanning the structure mountable thereon in the opening of the building member, said mounting member having one end fastenable to the structural element extending across the opening and the other end fastenable to the other structural element; rotary drive means fastened to said mounting member so as to be positioned above...