Drill bit

US5655613A · kind A · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventors

• Werner Lauermann · Ludesch, AT
• Markus Geiger · Langenfeld, DE
• Rolf Spangenberg · Gauting, DE

Key dates

• Filing date: Oct 18, 1995
• Grant date: Aug 12, 1997
• Expiry date: Oct 18, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23B51/0473
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A drill bit is formed of an insertion end part (1) and carrier part (2) containing drilling cutter members (8). The insertion end part (1) and the carrier part (2) are joined together by a threaded connection. The two parts are secured by a radially flexible spring washer (7) for preventing an unintended detachment of the two parts.