Chisel holder

US9151157B2 · kind B2 · utility

Assignee

• Wirtgen GmbH

Inventors

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

Key dates

• Filing date: Dec 2, 2011
• Grant date: Oct 6, 2015
• Expiry date: Dec 2, 2031

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 for an earth working machine, in particular a road milling machine, having a support member onto which an insertion projection is indirectly or directly attached on an insertion projection side, the support member comprising two first and/or two second stripping surfaces that are at an angle to one another, and the support member having a working side that comprises a bit receptacle. In order to achieve a stable and long-lived configuration for such a bit holder, provision is made according to the present invention that the first and/or second stripping surfaces diverge from the insertion projection side toward the working side.