Rock drill with hard metal drilling head

US4202420A · kind A · utility

Assignee

• Hawera Probst GmbH · DE

Inventors

• Wolfgang Peetz · Blitzenreute, DE
• Siegfried Klaissle · Schorndorf, DE
• Bernhard Moser · Altshausen, DE

Key dates

• Filing date: Jul 31, 1978
• Grant date: May 13, 1980
• Expiry date: Jul 31, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S173/02
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A rock drill for rotary blow drilling with a drilling head arranged at the free end of the drill shaft, which at least partially consists of hard metal. The drilling head the end face of which is circular disc shaped or circular ring shaped includes a formed piece of solid hard metal. Cutting bodies are machined out of the end of this piece of hard metal which cutting bodies have the shape of pyramids or truncated pyramids and taper with increasing distance from the drill shank.