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:
Mar. 20, 2012
Filed:
Oct. 30, 2009
Ben to Fan Wong, Hong Kong, CN;
Biao Yu, Shenzhen, CN;
Tian Jun Liao, Shenzhen, CN;
Johnson Electric S.A., La Chaux-de-Fonds, CH;
Abstract
A motor comprises a stator and a rotor () disposed within the stator. The stator comprises: a housing () having a polygon cross section that comprises a plurality of side portions (-) and a plurality of curved corner portions (-), each of the corner portions connect two adjacent side portions and curve around a center (O') which is offset from the rotational center (O) of the rotor; and a ring magnet () fixed to the inner surface of the housing. An air gap () is formed between a peripheral surface of the rotor () and an inner surface of the ring magnet (). The thickness of the ring magnet at portions corresponding to the corner portions (-) of the housing being larger than the thickness of the ring magnet at portions corresponding to the side portions (-) of the housing.