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:
Dec. 15, 1981
Filed:
Sep. 12, 1979
Hans-Jurgen Lannoch, Hochstetten, DE;
Fichtel & Sachs AG, Schweinfurt, DE;
Abstract
A chain change gear for shifting a driving chain to engage a selected one of a set of chain wheels associated with a driven wheel such as the rear wheel of a bicycle includes an articulated lever, a guide piece and first and second joint blocks for transferring movement from the articulated lever to the guide piece. The first joint block is arranged to be fixed to the vehicle frame and the second joint block is arranged to be connected to a chain guiding and tensioning mechanism for moving the mechanism to shift the chain into engagement with the selected one of the chain wheels when the articulated lever is actuated. The guide piece has two first stub axles extending parallel to each other from opposite ends of the guide piece, and the articulated lever has two second stub axles which extend parallel to each other from opposite ends of the articulated lever. The first and second joint blocks each have a first bore for receiving a first stub axle for relative sliding movement and a second bore, extending parallel to the first bore, for receiving a second stub axle for relative pivotal movement. A fastening member extends centrally through both the guide piece and the articulated lever and parallel to the first and second stub axles for connecting the articulated lever and the guide piece together for relative pivotal movement.