The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 2011
Filed:
Oct. 16, 2008
Hitoshi Takaki, Kyoto, JP;
Shigeo Hayashi, Kyoto, JP;
Yusuke Iwai, Kyoto, JP;
Nobuaki Yasumoto, Kyoto, JP;
Yosuke Kawano, Kyoto, JP;
Hitoshi Takaki, Kyoto, JP;
Shigeo Hayashi, Kyoto, JP;
Yusuke Iwai, Kyoto, JP;
Nobuaki Yasumoto, Kyoto, JP;
Yosuke Kawano, Kyoto, JP;
Nidec Corporation, Kyoto, JP;
Abstract
A motor includes a rotating body including a magnet, and a fixed body including a stator. The stator includes a stator core having an annular core back portion with an upper and a lower surface, and a plurality of circumferentially spaced-apart tooth portions extending from the core back portion in a direction away from the rotational axis, and a plurality of coils provided by winding a conductive wire around the tooth portions of the stator core with multiple turns. The rotor holder is arranged axially above the stator to cover the stator. Further, an annular or arc-shaped attracting magnet arranged to attract the rotor holder toward the stator is arranged radially inwardly of the core back portion, the attracting magnet having an upper surface axially facing toward the rotor holder, and a lower surface arranged axially below the upper surface of the core back portion of the stator core.