Twist-grip shifter for bicycles

US6055882A · kind A · utility

Assignee

• Fichtel & Sachs · DE

Inventors

• Markus Arbeiter · Würzburg, DE
• Nico Lemmens · Bergrheinfeld, DE

Key dates

• Filing date: Apr 25, 1997
• Grant date: May 2, 2000
• Expiry date: Apr 25, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/20438
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A twist-grip shifter for bicycles having a twist grip, which twist grip includes an outer grip part and an inner twist part. The twist grip has an area with a small diameter, a transitional area, and an area with a large diameter, and the twist grip can be positively and detachably connected to a twist grip shifter in the axial direction. The twist grip can have an elastic rubber grip part and a non-elastic rotary part, and can have a surface structure with root-like, sharp ribs on the external surface of the grip part. The surface structure on the grip part has the advantage that the fins or peaks extend axially along the surface lines, and fit into the bends underneath the joints of the index finger, to essentially guarantee the optimum transmission of torque from the hand of the rider to the twist grip.