Electric fan

Details Electric fan Electric fan

2006-06-15

2008-10-28

Harvey, James (Department: 2833)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S062000, C310S06700R, C310S091000, C310S156260

Reexamination Certificate

active

07443073

ABSTRACT:
An electric fan includes a frame (10) having a central tube (12) extending therefrom, a bearing (30) received in the central tube, a stator (50) mounted around the central tube, and a rotor (70) being rotatably supported by the bearing. The frame defines an air inlet (19) and an air outlet (17) at two different sides thereof. The stator includes a stator core (52) having a central cylinder (520). A plurality of radial posts (522) extends from the central cylinder. A plurality of magnetic poles (524) is formed at free ends of the posts. A plurality of stator coils (54) is wound around the posts. Each magnetic pole includes a lower portion (700) adjacent to the air outlet and an upper portion (60) adjacent to the air inlet. The upper portions expand radially along a direction from the air inlet to the air outlet.

REFERENCES:
patent: 4987331 (1991-01-01), Hrong
patent: 6672839 (2004-01-01), Schloetzer
patent: 2005/0067917 (2005-03-01), Kastinger et al.
patent: 2006/0279157 (2006-12-01), Tung et al.
patent: 2007/0013242 (2007-01-01), Tung et al.
patent: 2007/0075598 (2007-04-01), Tung et al.
patent: 2007/0080604 (2007-04-01), Yang et al.
patent: 99248063.9 (2000-08-01), None

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