Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
February 11, 2014
Patent Application Number
12728666
Date Filed
March 22, 2010
Patent Citations Received
Patent Primary Examiner
Patent abstract
An exhaust fan assembly is provided for expelling contaminated air from a building. The assembly includes a plenum, a fan assembly attached to the plenum, and a windband mounted on top of the fan assembly. The fan assembly is constructed of cylindrical outer and inner walls which define a bearing chamber and surrounding annular space. A fan driven by a shaft extending downward from the bearing chamber draws exhaust air from the plenum and blows it up through the annular space to a nozzle at the top of the fan assembly.
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