Patent · US Active

Tool holder

US9399914B2 · kind B2 · utility

4Cited by

15References

8Claims

0Family size

Assignee

Wirtgen GmbH

Inventors

Markus Roth · Schenkenzell, DE
Thomas Allgaier · Schramberg, DE
Thomas Lehnert · Oberraden, DE

Key dates

Filing date	Oct 11, 2012
Grant date	Jul 26, 2016
Priority date	—
Expiry date	Feb 5, 2033

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21C35/19
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

The invention relates to a bit holder for a road milling machine or the like, having a base part on which a bit shank and a projection are shaped, the projection comprising a bit receptacle, and the bit receptacle being constituted from a socket-shaped insert made of hard material. With a bit holder of this kind, good rotational behavior of the bit can be assisted and stable bracing thereof can be guaranteed, with little parts outlay, if provision is made that the bit receptacle is embodied as a stepped bore that comprises a first and a second diameter region, the first diameter region having a larger inside diameter than the second diameter region.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.