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. 29, 1983
Filed:
Aug. 05, 1980
Eduard Bergles, Graz, AT;
Fichtel & Sachs AG, Schweinfurt, DE;
Abstract
A derailler system for a bicycle including a sprocket system having a plurality of drive sprockets and a chain for driving a wheel of the bicycle at different speeds is shifted by actuation of a movable carrier member having an idler sprocket rotatably mounted thereon for selectively shifting the chain into engagement individually with the drive sprockets. A guide system for guiding movement of the carrier member along a path essentially parallel with the axis of the driven wheel to urge the chain between individual sprockets is provided, with the guide system including a first and a second part thereof movable relative to each other. A shifting mechanism including a shift lever enables shifting of the movable carrier to a plurality of shifting positions corresponding with the drive sprockets. A cam is fixedly mounted on the first part of the guide system and a cam follower member including a cam follower is rotatably mounted on the second part of said guide system. The cam member and the cam follower member are moved relative to each other by operation of the shift lever and an additional guide element is provided for maintaining the cam follower in contact with the cam member during relative movement therebetween thereby to effect movement of the movable carrier member during this relative movement.