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. 28, 2017
Filed:
May. 15, 2015
Applicant:
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Inventors:
Manabu Saito, Tokyo, JP;
Tatsuo Nakahata, Tokyo, JP;
Hideharu Takahashi, Tokyo, JP;
Masao Watanabe, Tokyo, JP;
Toshio Nishino, Tokyo, JP;
Assignee:
SUBARU CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23B 51/02 (2006.01); B23B 51/00 (2006.01); B23P 15/28 (2006.01); B24B 3/24 (2006.01);
U.S. Cl.
CPC ...
B23B 51/00 (2013.01); B23P 15/28 (2013.01); B24B 3/242 (2013.01); B23B 2222/56 (2013.01); B23B 2226/27 (2013.01); B23B 2226/275 (2013.01); B23B 2251/08 (2013.01); B23B 2251/082 (2013.01); B23B 2251/085 (2013.01); B23B 2251/14 (2013.01); B23B 2251/18 (2013.01); B23B 2251/201 (2013.01); B23B 2251/202 (2013.01); B23B 2251/204 (2013.01); B23B 2251/205 (2013.01); B23B 2251/207 (2013.01); B23B 2251/248 (2013.01); Y10T 408/89 (2015.01);
Abstract
According to one implementation, a drill has at least one cutting edge. A projected shape of a passing area of a ridgeline of the at least one cutting edge when the at least one cutting edge is rotated around a tool axis becomes a line-symmetric and discontinuous line along a parabola, two parabolas, an ellipse or two ellipses. The projected shape is drawn on a projection plane parallel to the tool axis.