The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Aug. 31, 2010

Filed:

Dec. 07, 2005
Applicants:

Bernd Holl, Neustadt/Wied, DE;

Dieter Simons, Buchholz, DE;

Inventors:

Bernd Holl, Neustadt/Wied, DE;

Dieter Simons, Buchholz, DE;

Assignee:

Wirtgen GmbH, Windhagen, DE;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21C 35/18 (2006.01);
U.S. Cl.
CPC ...
Abstract

A chisel holder system including a base part and a chisel holder. The base part includes a socket wherein the chisel holder with a plug-in insert is introduced. The chisel holder has a bearing surface supported on a supporting surface of the base plate, and the base part has a shoulder connected to the supporting surface. A replacement chamber is formed between the shoulder and a facing end surface of the chisel holder. According to this invention, the supporting surface is placed in the transition region in relation to the shoulder by at least one recess of the shoulder so that the flat-shaped connection between the supporting surface and the shoulder, in the region of the recess, is interrupted in order to optimize the resistance to wear and tear of the base part.


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