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:
Mar. 28, 2017
Filed:
Mar. 11, 2015
Applicant:
Kennametal, Inc., Latrobe, PA (US);
Inventors:
Juergen Schwaegerl, Vohenstrauss, DE;
Herbert Rudolf Kauper, Erlangen, DE;
Assignee:
KENNAMETAL, INC., Latrobe, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23B 51/02 (2006.01); B24B 3/26 (2006.01);
U.S. Cl.
CPC ...
B23B 51/02 (2013.01); B24B 3/26 (2013.01); B23B 2251/04 (2013.01); B23B 2251/18 (2013.01); Y10T 408/906 (2015.01);
Abstract
A rotary tool, in particular drilling tool, extends along a longitudinal axis and has an end surface; a brad point; and at least one major cutting edge extending outward up to an edge corner. A first free surface segment adjoins the major cutting edge, and a second free surface segment in turn adjoins said first free surface segment. To keep the stress, in particular the wear, low in the region of the end surface, the first free surface segment has a lower average abrasiveness than the second free surface segment.