Cooling fan with motor cooler

Details Cooling fan with motor cooler Cooling fan with motor cooler

2005-10-11

2008-10-28

Lam, Thanh (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S052000

Reexamination Certificate

active

07443063

ABSTRACT:
A cooling fan comprising an outer housing. A motor support is fixed to the outer housing and a motor is mounted to the motor support. A hub is rotatably coupled to the motor and, with the motor support, forms a motor enclosure that substantially surrounds the motor. A plurality of blades extend radially from the hub and are arranged so as to generate a flow of air around the motor enclosure when the blades are rotated. The cooling fan also comprises a motor cooler comprising a flow path through the motor enclosure, wherein the flow path has a first opening and a second opening, wherein the second opening is disposed within an area of lowered downstream pressure so as to develop a differential pressure between the first and second openings and generate a flow of air through the motor enclosure as the motor operates.

REFERENCES:
patent: 6700235 (2004-03-01), McAfee
patent: 2002/0070615 (2002-06-01), Jakoby et al.
patent: 2004/0263008 (2004-12-01), Voigt et al.
John P. Franz, “Fan Unit and Methods of Forming Same,” U.S. Appl. No. 10/827,965, filed Apr. 19, 2004, 28 pp.

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