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:
Oct. 25, 2011
Filed:
Mar. 25, 2008
Kinya Mizuno, Saitama, JP;
Hiromi Sumi, Saitama, JP;
Masako Takahashi, Saitama, JP;
Masaki Kobayashi, Saitama, JP;
Eiji Kittaka, Saitama, JP;
Kinya Mizuno, Saitama, JP;
Hiromi Sumi, Saitama, JP;
Masako Takahashi, Saitama, JP;
Masaki Kobayashi, Saitama, JP;
Eiji Kittaka, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An outer circumference of a shift drum of a vehicle transmission is provided with at least one particular lead groove among multiple lead grooves which continuously extends beyond one circle of the shift drum. Two ends of the particular lead groove are arranged so as to be out of alignment with each other in the axial direction of the shift drum. A common shift position adapted to establish gear trains with two shift stages different from each other is set at one position corresponding to the two ends of the particular lead groove along the circumferential direction of the shift drum. The resulting configuration prevents an increase in the diameter of a shift drum and eliminates the significant change of the shape of a lead groove, even as the number of shift positions set on the shift drum is increased.