Derailleur arrangement, in particular for bicycles

US5503598A · kind A · utility

Assignee

• Fichtel & Sachs · DE

Inventors

• Andreas Neuer · Schweinfurt, DE
• Jorg Bodmer · Schweinfurt, DE

Key dates

• Filing date: Sep 12, 1994
• Grant date: Apr 2, 1996
• Expiry date: Sep 12, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B62M9/10
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A derailleur with at least two sprockets (A, C) on a sprocket unit (A-C) is designed so that the chain (B) can be shifted up and down more easily between a smaller sprocket (C) and a larger sprocket (A). For this purpose, there is a double tooth space (ZA) on at least the larger sprocket (A), which forms a channel for the transfer of the chain between the two sprockets. By means of a link support plate (16) of the larger sprocket (A), a path (B1, B2. B3, B4, B5) which is curved or bent radially outwardly convexly--seen in the axial direction--of a chain transfer segment is achieved, which is formed during the transfer of the chain from the smaller sprocket (C) to the larger sprocket (A) in the vicinity of the double tooth space (ZA).