Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yoji Sato0
Date of Patent
October 13, 2009
0Patent Application Number
111314090
Date Filed
May 18, 2005
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A cooling fan has a metal spacer, a boss made of Nylon integrally formed with the spacer by an insert molding and seven blades extending outward therefrom. A skew angle of about 30 degrees is provided at a connecting portion or a base end portion of the blade to the boss so as to be inclined backward in relation to a rotating direction of the cooling fan. To the contrary, a skew angle of about 8 degrees is provided at a portion extending from the connecting portion to the leading end of the blade so as to be inclined forward in relation to the rotating direction.
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