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:
Sep. 13, 2016
Filed:
Jul. 31, 2013
Yamaha Hatsudoki Kabushiki Kaisha, Shizuoka-ken, JP;
Tsukasa Shimizu, Shizuoka-ken, JP;
Haruyoshi Hino, Shizuoka-ken, JP;
YAMAHA HATSUDOKI KABUSHIKI KAISHA, Shizuoka-Ken, JP;
Abstract
A magnetic resistance changing mechanism for changing a magnetic resistance of a stator magnetic path including a stator yoke portion and each tooth portion by mechanically changing the stator magnetic path is provided. A pair of side protruded portions are formed on circumferential sides of a rotor side end portion of each tooth portion. The rotor side end face of each tooth portion is shaped so that a gap between the rotor side end face of each tooth portion and an outer periphery of the rotor is increased continuously or stepwisely from a circumferential intermediate portion of the rotor facing end face toward circumferential end portions thereof.