Cutters for use in mineral mining

US4637658A · kind A · utility

Inventors

• Wolfgang Annipajo · Grafenau, DE
• Oswald Breuer · Lichtenau, DE
• Christoph Rassmann · Grafenau, DE

Key dates

• Filing date: Aug 2, 1985
• Grant date: Jan 20, 1987
• Expiry date: Aug 2, 2005

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21C35/1837
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A floor cutter bit for a coal plough has a body carrying a pair of hard metal plates which define a coal face cutting edge and a floor cutting edge. A hard metal pin locates between the plates and receives end zones of the plates within recesses.