Rock drill

US7021872B2 · kind B2 · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventors

• Udo Hauptmann · Landsberg am Lech, DE
• Tim Pröls · Munich, DE
• Thorsten Assel · Landsberg, DE

Key dates

• Filing date: Nov 18, 2002
• Grant date: Apr 4, 2006
• Expiry date: Jul 8, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T408/9097
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A rock drill (1) for cutting rock comprising an elongated, helical shaft (2), which has, at one end, an insertion part (3) and, at the end opposite, a tool head (4) with cutters (5) made of hard material, wherein the helical shaft (2) is at least partially coated with a colored layer (7a, 7b) and the layer forms a lengthwise running wear indicator marking (8) inside the helical groove (8).