Small-sized motor having polygonal outer shape

Details Small-sized motor having polygonal outer shape Small-sized motor having polygonal outer shape

2007-02-22

2008-09-23

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S154210, C310S154030, C310S154140, C310S154150, C310S0400MM

Reexamination Certificate

active

07427817

ABSTRACT:
A small-sized motor having a polygonal outer shape includes four or more field magnets attached to the inner surface of a motor casing made of metal. A tubular portion of the motor casing is formed into a polygonal tubular shape such that flat side portions equal in number to field poles, and flat or curved corner portions equal in number to the field poles and each being located between the adjacent side portions are sequentially joined together. The field magnets have a smaller thickness at portions corresponding to the side portions of the motor casing and a larger thickness at portions corresponding to the corner portions of the motor casing. The field magnets are fixed while coinciding in center position with the corresponding corner portions of the motor casing and while being pressed against the corresponding corner portions of the motor casing from inside.

REFERENCES:
patent: 4412145 (1983-10-01), Voss et al.
patent: 4453097 (1984-06-01), Lordo
patent: 5201111 (1993-04-01), Prohaska
patent: 6995488 (2006-02-01), Yamashita et al.
patent: 2004/0061406 (2004-04-01), Yokota et al.
patent: 2007/0007838 (2007-01-01), Kuroda
patent: 1727259 (2006-11-01), None
patent: 64-12455 (1989-01-01), None
patent: 7-59322 (1995-03-01), None
patent: 10201206 (1998-07-01), None
patent: 2005-20914 (2005-01-01), None
Translation of JP 07059322 (dated: Mar. 3, 1995) (Yamaguchi Tadao et al.).
Translation of JP 10201206 (date: Jul. 31, 1998) (Yui Katsuhiko).

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