Combination drilling member

US6073710A · kind A · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventors

• Franz Popp · Großburgwedel, DE
• Heinz Bisping · Munich, DE
• Thomas Belz · Munich, DE

Key dates

• Filing date: Mar 18, 1998
• Grant date: Jun 13, 2000
• Expiry date: Mar 18, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T408/892
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A combination drilling member includes an axially elongated drill, such as used for drilling rock, having an axially extending shaft (2) with a first end leading in the drilling direction containing a cutting bit (3). The shaft (2) has at least one helical drilled material removal groove (4) and an auxiliary element encircling and detachably connected to the shaft (2) intermediate the ends thereof. The auxiliary element (6) has at least one elastic plastic part (9) extending around the shaft and containing a through hole (10) for the shaft where the plastic part is secured to the shaft by at least one of frictional and positive locking engagement against inadvertent axial displacement and held against relative rotation to torques of up to 40 Nm.