Chisel holder, and chisel holder system comprising a chisel holder and a base part

US9163502B2 · kind B2 · utility

Assignee

• Wirtgen GmbH

Inventors

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

Key dates

• Filing date: Dec 2, 2011
• Grant date: Oct 20, 2015
• Expiry date: Mar 26, 2032

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21C35/191
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A chisel holder comprises a body zone (12) having a chisel receiving opening (18) that is open at least in the direction of a chisel insertion end (14) of the body zone (12), and also comprises a fastening shaft (26) which extends from a supporting end (20) of the body zone (12) and has a longitudinal shaft axis. A fastening member-affecting zone is provided on a first side of the fastening shaft (26), and a supporting zone (78) that has supporting surface regions (88, 90) which are inclined relative to each other and adjoin each other in a transition zone (92) extending in the direction of the longitudinal shaft axis is provided on a second side of the fastening shaft (26), said second side lying opposite the first side relative to the longitudinal shaft axis. Said chisel holder is characterized in that the transition zone (92) is designed like a cavity, or/and at least some sections of at least one supporting surface region (88, 90) project radially outward from a basic outer peripheral surface (94) of the fastening shaft (26) in relation to the longitudinal shaft axis.