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:
May. 20, 2008
Filed:
May. 25, 2005
Applicants:
Tatsuaki Tanaka, Kasai, JP;
Kazuhiro Tomoshige, Kasai, JP;
Ryohei Adachi, Hyogo, JP;
Inventors:
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
H02K 1/18 (2006.01); H02K 1/22 (2006.01); H02K 1/28 (2006.01); H02K 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A hub unit for use in electrically assisted bicycles has an improved effect to radiate heat from a stator. A hub () has inner teeth () meshable with planetary gears () and a fixing support shaft () projecting from opposite ends of the hub and provided fixedly relative to a motor housing (). The motor housing () has no cylindrical wall () covering the outer peripheral surface of the stator () but leaves the stator outer peripheral surface exposed to effectively release the heat generated by the windings of the stator.