Chisel holder and lower tool part for a chisel holder

US9267373B2 · kind B2 · utility

Assignee

• Wirtgen GmbH

Inventors

• Karl Kammerer · Fluorn-Winzeln, DE
• Markus Roth · Schenkenzell, DE
• Bernhard Diessner · Fulpmes, AT
• Thomas Lehnert · Oberraden, DE
• Karsten Buhr · Willroth, DE
• Martin Lenz · Graz, AT
• Cyrus Barimani · Rübhausen, DE
• Günter Hähn · Rübhausen, DE

Key dates

• Filing date: Dec 2, 2011
• Grant date: Feb 23, 2016
• Expiry date: Feb 8, 2032

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21C35/1933
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

The invention relates to a bit holder having an insertion projection and having a bore-shaped bit receptacle that has a longitudinal center axis, a convexly curved support surface being provided on a base part. A bit holder of this kind can be implemented in compact and stable fashion in particular by the fact that the longitudinal center axis of the bit receptacle intersects the support surface.