Fan casing with built-in motor poles

Details Fan casing with built-in motor poles Fan casing with built-in motor poles

2006-05-16

2006-05-16

Freay, Charles G. (Department: 3746)

Pumps

Motor driven

Electric or magnetic motor

C417S423140

Reexamination Certificate

active

07044721

ABSTRACT:
A casing for a heat-dissipating fan includes a bottom board and a plurality of sidewalls extending from the bottom board. The bottom board and the sidewalls are integrally formed by punching a magnetically conductive plate. The bottom board includes a base on which a stator having a coil assembly is mounted. An axial hole is defined in the base of the bottom board, and a bearing is mounted in the axial hole for rotatably holding a shaft of a rotor. Magnetic pole faces are formed on the base of the bottom board by punching the base of the bottom board. The magnetic pole faces surround the axial hole and are adjacent to the coil assembly of the stator.

REFERENCES:
patent: 3448306 (1969-06-01), Murray
patent: 3558940 (1971-01-01), Chestnut et al.
patent: 4059780 (1977-11-01), Mazuir
patent: 5176509 (1993-01-01), Schmider et al.
patent: 5831359 (1998-11-01), Jeske
patent: 5879141 (1999-03-01), Yokozawa et al.
patent: 6239971 (2001-05-01), Yu et al.
patent: 6270325 (2001-08-01), Hsieh
patent: 6525938 (2003-02-01), Chen
patent: 58-127549 (1983-07-01), None

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