Cutter-bit assemblies

US4626034A · kind A · utility

Assignee

• Gewerkschaft Eisenhutte Westfalia GmbH · DE

Inventors

• Oswald Breuer · Lichtenau, DE
• Bernd Steinkuhl · Grafenau, DE
• Franz Roling · Grafenau, DE
• Norbert Hesse · Bochum, DE
• Christoph Rassmann · Grafenau, DE
• Gunther-Dietmar Schoop · Ottmarsbocholt, DE
• Werner Holtken · Grafenau, DE

Key dates

• Filing date: Feb 5, 1985
• Grant date: Dec 2, 1986
• Expiry date: Feb 5, 2005

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21C35/19
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A cutter-bit assembly employs an arcuate wedge 16 to secure a cutter-bit 2 within a pocket 4 of a holder 1. An additional deformable insert or resilient backing piece 18 is also located in an arcuate gap between the cutter-bit shank and a curved surface of the holder. The insert or backing piece co-operates with teeth 19 to lock the wedge in position.