Index shifter for bicycle transmissions

US6042133A · kind A · utility

Assignee

• Mannesmann Sachs AG · DE

Inventors

• Berndt Leiter · Waigolshausen, DE
• Bernhard Johanni · Oberwerrn, DE
• Max Rumpel · Werneck, DE
• Klaus Konig · Leverkusen, DE
• Klaus Stuhler · Schonungen, DE
• Markus Arbeiter · Würzburg, DE

Key dates

• Filing date: Sep 10, 1997
• Grant date: Mar 28, 2000
• Expiry date: Sep 10, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/20287
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An index shifter for a bicycle transmission, which index shifter is mounted on a part of a bicycle and has a casing, a locking element with notches which is connected to a rotary hand grip, and a winding drum for actuating a cable pull. The casing has a ring-shaped recess disposed therein, in which recess a detent spring is arranged. The detent spring is braced by two feet against the casing and has a lug which engages with the locking ring. Inside the casing is a casing projection with which one foot of the detent spring can be fixed to achieve a small amount of shift play. This permits small amounts of shift play, in particular for shifting hub gears on bicycles.