Device for shifting the chain on a front chain wheel for a bicycle

US9944351B2 · kind B2 · utility

Assignee

• SRAM, LLC · US

Inventors

• Michael Braun · Altensteig, DE
• Marcus Auer · Schweinfurt, DE
• Markus Engel · Koblenzer Straße, DE

Key dates

• Filing date: Feb 26, 2015
• Grant date: Apr 17, 2018
• Expiry date: Aug 4, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B62M9/135
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A shifting assembly for shifting a roller chain between a plurality of front chain wheels for a bicycle that includes a smaller chain wheel, a larger chain wheel and a chain derailleur having a channel on an inner guide plate. The channel has an elevation that comes into contact with a chain rise rivet on the larger chain wheel in the state of starting to shift the roller chain from the smaller chain wheel to the adjacent larger chain wheel, viewed in a direction parallel to the axis of rotation of the chain wheels.