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.
Patent No.:
Date of Patent:
Jul. 26, 2016
Filed:
Oct. 11, 2012
Applicants:
Betek Gmbh & Co. KG, Aichhalden, DE;
Wirtgen Gmbh, Windhagen, DE;
Inventors:
Assignee:
Wirtgen GmbH, , CZ;
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 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.