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:
Jan. 31, 2012
Filed:
May. 30, 2007
Applicants:
Ulrich F. Krenzer, Zirndorf, DE;
Herbert R. Kauper, Nürnberg, DE;
Inventors:
Ulrich F. Krenzer, Zirndorf, DE;
Herbert R. Kauper, Nürnberg, DE;
Assignee:
Kennametal Inc., Latrobe, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23B 51/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
This application relates to a twist drill for use in a machine tool with a major cutting edge divided into two partial cutting edges by a chisel edge wherein longitudinal cutting edges extend along the length of the drill such that the first longitudinal cutting edge makes a rough cut and the second longitudinal cutting edge makes a finishing cut during operation.