US Patent 7086837 Centrifugal blower fan
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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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US Patent 07086837 Centrifugal blower fan US Patent 7086837 Centrifugal blower fan
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Patent Number
0708683700
Patent Number
708683700
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Patent Jurisdiction
Patent Number
070868370
Date of Patent
August 8, 2006
0Patent Application Number
108291970
Date Filed
April 22, 2004
0Official Website
Patent Primary Examiner
Edits on 26 Sep, 2022
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Patent Jurisdiction
Patent Number
070868370
Date of Patent
August 8, 2006
0Patent Application Number
108291970
Date Filed
April 22, 2004
0Official Website
Patent Primary Examiner
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US Patent 07086837 Centrifugal blower fan
Infobox
Is a
Patent jurisdiction
Patent number
07086837
Date of patent
August 8, 2006
Patent application number
10829197
Date Filed
April 22, 2004
Patent primary examiner
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