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:
Dec. 29, 2015

Filed:

Oct. 11, 2012
Applicants:

Betek Gmbh & Co. KG, Aichhalden, DE;

Wirtgen Gmbh, Windhagen, DE;

Inventors:

Thomas Allgaier, Schramberg-Sulgen, DE;

Thomas Lehnert, Oberraden, DE;

Markus Roth, Aichhalden, DE;

Assignee:

Wirtgen GmbH, , DE;

Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21C 35/19 (2006.01); E21C 35/197 (2006.01); E21C 35/18 (2006.01);
U.S. Cl.
CPC ...
E21C 35/197 (2013.01); E21C 35/18 (2013.01); E21C 35/19 (2013.01);
Abstract

The invention relates to a tool system having a bit holder and a shank bit, the bit holder comprising a bit receptacle that comprises a first and a second diameter region that lead into one another via a transitional segment (taper), a bit shank of the shank bit comprising a first and a second cross-sectional region that lead into one another via a transitional segment. With a tool system of this kind, a wear-optimized design results from the fact that the transitional segments of the shank bit and of the bit holder are arranged spaced away from one another in the direction of the longitudinal center axis of the shank bit, in order to form a resetting space.


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