Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
August 8, 2006
Patent Application Number
10829197
Date Filed
April 22, 2004
Patent Citations Received
Patent Primary Examiner
Patent abstract
It is the object of the present invention to provide a centrifugal blower fan capable of reducing a noise in an operating rotational speed range without degradation in blàwer performance. A centrifugal blower fan comprises a base plate, and a plurality of fan blades arranged on the base plate in a radial pattern to define a plurality of air passages between the pairs of adjacent fan blades, respectively. A portion of the base plate serving as a bottom wall of each of the air passages is formed with a plurality of through-holes.
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