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:
Nov. 10, 2015
Filed:
Jun. 03, 2014
Applicant:
Kennametal Inc., Latrobe, PA (US);
Inventors:
X. Daniel Fang, Brentwood, TN (US);
Jean-Luc Dufour, Franklin, TN (US);
David J. Wills, Franklin, TN (US);
Assignee:
KENNAMETAL, INC., Latrobe, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23B 51/02 (2006.01); B23B 27/16 (2006.01);
U.S. Cl.
CPC ...
B23B 51/02 (2013.01); B23B 27/16 (2013.01); B23B 2222/28 (2013.01); B23B 2224/00 (2013.01); B23B 2226/18 (2013.01); B23B 2226/31 (2013.01); B23B 2226/315 (2013.01); B23B 2251/02 (2013.01); B23B 2251/14 (2013.01); B23B 2251/50 (2013.01); Y10S 408/713 (2013.01); Y10T 408/78 (2015.01); Y10T 408/81 (2015.01); Y10T 408/8923 (2015.01); Y10T 408/909 (2015.01); Y10T 408/9095 (2015.01); Y10T 408/9097 (2015.01); Y10T 408/9098 (2015.01);
Abstract
One non-limiting aspect of the present disclosure is directed to a multi-piece twist drill head. The multi-piece twist drill head includes a core piece formed from a first hard material, and a peripheral piece formed from a second hard material. The core piece and peripheral piece each comprise a cutting edge and are adapted to mate to provide a central region and a peripheral region, respectively, of the multi-piece twist drill head. A twist drill including the multi-piece twist drill head is also disclosed.