Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
John R. Savage0
Tao Hong0
Date of Patent
July 17, 2007
0Patent Application Number
106753420
Date Filed
September 30, 2003
0Patent Citations Received
Patent Primary Examiner
Patent abstract
An electrically powered axial-flow fan has a hub to house the motor and support the fan blades. Small blades or vanes on the inside of the hub function as a radial-flow blower to draw cooling air through cooling ports on the electric motor housing. The vanes inside the hub cooperate with a flange surrounding the motor to form a low pressure chamber under the hub to improve cooling flow through the motor. This motor cooling air flow is then ejected into the exhaust stream of the axial-flow fan.
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