Rock drill

US4729441A · kind A · utility

Assignee

• Hawera Probst GmbH · DE

Inventors

• Wolfgang Peetz · Blitzenreute, DE
• Bernhard Moser · Altshausen, DE

Key dates

• Filing date: Jul 10, 1985
• Grant date: Mar 8, 1988
• Expiry date: Jul 10, 2005

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B10/54
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A rock drill in which the depth of the recessed groove for accommodating the cutting body is made greater than the axial brazing-in depth of the cutting body whereby a largely stress-free seating of the cutting body results. In particular, for rock drills for making break-throughs, this recessed groove extended in the radial direction into lobes of a drill head can be used for locating cutting bodies in the lobes.