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:
Apr. 29, 1997
Filed:
Feb. 02, 1996
Yoshiaki Ando, Kawachinagano, JP;
Shimano, Inc., Osaka, JP;
Abstract
A rear derailleur for a bicycle having a bracket connected to a bicycle frame, a guide wheel for shifting a chain, a support member for supporting the guide wheel, a base member pivotably attached to the bracket, a tension spring for biasing the base member in a predetermined pivoting direction, and a parallelogram link mechanism for linking the support member and the base member. The bracket has a mounting section formed in a region thereof adjacent the bicycle frame and opposed to the bicycle frame. The tension spring is attached to the mounting section so as to lie between the bicycle frame and the mounting section. The tension spring is a coil spring having one end thereof fixed to the mounting section, and the other end fixed to the base member. An axis extends through a middle tubular space of the coil spring for pivotally connecting the base member to the bracket. The link mechanism includes an inner pivotal link, and an outer pivotal link disposed farther from the bicycle frame than the inner pivotal link is. The inner pivotal link is connected at one end thereof to the base member by a first pivot pin. The first pivot pin is disposed closer to the bicycle frame than the mounting section is.