Cooling fan

Optics: image projectors – Temperature control – Blower

Reexamination Certificate

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Details

C353S057000, C417S423140

Reexamination Certificate

active

11020247

ABSTRACT:
Disclosed is a cooling fan including a fan rotated by a motor, for forcibly circulating the air, and a fan housing having a through hole with a predetermined inside diameter so that the fan can be mounted thereon. A curvature radius of the end of the inner circumference of the through hole sucking the air is smaller than a curvature radius of the end of the inner circumference of the through hole discharging the air. As a result, the cooling fan can minimize noises in the operation.

REFERENCES:
patent: 6325597 (2001-12-01), Kim et al.
patent: 6472781 (2002-10-01), Yamamoto
patent: 6565334 (2003-05-01), Bradbury et al.
patent: 6572333 (2003-06-01), Fujinaka
patent: 7110255 (2006-09-01), Ko et al.
patent: 2002/0171777 (2002-11-01), Park
patent: 2003/0182954 (2003-10-01), Parker et al.
patent: 2005/0007558 (2005-01-01), Shiraishi et al.
patent: 2005/0186096 (2005-08-01), Vinson et al.
patent: 1271818 (2000-11-01), None
patent: 1364984 (2002-08-01), None
patent: 1386984 (2002-12-01), None
patent: 1473243 (2004-02-01), None

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