Rock drill

US5482124A · kind A · utility

Assignee

• Hawera Probst GmbH · DE

Inventors

• August Haussmann · Ravensburg, DE
• Bernhard Moser · Altshausen, DE

Key dates

• Filing date: Nov 4, 1994
• Grant date: Jan 9, 1996
• Expiry date: Nov 4, 2014

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B10/58
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A rock drill for hammer drilling machines is proposed, which has a helical shank and a drill head which is connected thereto and on whose end face are arranged a main cutting tip inclined in the shape of a roof and also auxiliary cutting tips disposed transversely thereto. The drill head has two laterally opposite flats for the formation of drilling dust grooves. In plan view the drill head has a very largely rectangular shape in cross section, an acute angle .beta..sub.1 being enclosed between the main cutting tip and the trailing auxiliary cutting tips.