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:
Feb. 27, 2018
Filed:
Aug. 20, 2014
Applicant:
Mitsubishi Materials Corporation, Tokyo, JP;
Inventors:
Koichiro Naruke, Anpachi-gun, JP;
Sohei Takahashi, Anpachi-gun, JP;
Assignee:
MITSUBISHI MATERIALS CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B 51/02 (2006.01);
U.S. Cl.
CPC ...
B23B 51/02 (2013.01); B23B 2250/12 (2013.01); B23B 2251/406 (2013.01); B23B 2251/408 (2013.01); Y10T 408/9097 (2015.01);
Abstract
Provided is a drill suitable for high-efficiency working. A cut debris discharge groove is formed in the outer periphery of the drill body front end section rotated about the axis, and a cutting edge is formed at the front end of the drill body. The wall surface of the cut debris discharge groove, which faces the rotational direction of the drill, is formed to have a concave curve line shape in a cross-section perpendicular to the axis, the concave curve line shape extending along a first circular arc.