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:
Apr. 14, 2015
Filed:
Dec. 28, 2010
Applicant:
Jochen Gruber, Sigmaringen, DE;
Inventor:
Jochen Gruber, Sigmaringen, DE;
Assignee:
Guehring OHG, Albstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B 51/02 (2006.01);
U.S. Cl.
CPC ...
B23B 51/02 (2013.01); B23B 2251/18 (2013.01); B23B 2222/14 (2013.01); B23B 2222/84 (2013.01); B23B 2251/04 (2013.01); B23B 2251/085 (2013.01); B23B 2251/14 (2013.01);
Abstract
The invention relates to a multiple edge drill such as is especially used for machining difficult-to-machine, e.g. high-toughness materials, such as e.g. cast steel, steel for hardening and tempering or other difficult-to-machine steel materials including metallic cast materials, such as e.g. gray cast iron, and especially GGV or ADI cast iron. The facet is designed in such a manner that the main cutting edge has at least two main cutting edge sections that define point angles of different size, the radially outer point angle being smaller than the radially inner one, thereby obtaining a good cutting behavior and long service life of the tool.