Title:
DRILL
Document Type and Number:
WIPO Patent Application WO/2023/176003
Kind Code:
A1
Abstract:
(Problem) To provide a sharp drill resistant to breakage. (Solution) A drill of the present invention is characterized by comprising: first and second cutting edges formed rotationally symmetrically; first and second flanks formed rotationally symmetrically on the rear surface of the first and second cutting edges, respectively; one chip discharge groove formed from one of the first and second cutting edges toward the outer peripheral side; and one or more arc-shaped grooves formed from the other one of the first and second cutting edges toward the outer peripheral side. (Selected drawing) FIG. 1
Inventors:
ARAI KOICHI (JP)
ARAI GIICHI (JP)
KIMURA KATSUYO (JP)
TESHIMA SATOSHI (JP)
ARAI GIICHI (JP)
KIMURA KATSUYO (JP)
TESHIMA SATOSHI (JP)
Application Number:
PCT/JP2022/029018
Publication Date:
September 21, 2023
Filing Date:
July 27, 2022
Export Citation:
Assignee:
BIC TOOL CO LTD (JP)
International Classes:
B23B51/00; A61B17/16
Domestic Patent References:
| WO2021038651A1 | 2021-03-04 |
Foreign References:
| JP2012056055A | 2012-03-22 | |||
| JPH10315024A | 1998-12-02 | |||
| JP2018167341A | 2018-11-01 | |||
| JP2006088267A | 2006-04-06 | |||
| JP2012192514A | 2012-10-11 | |||
| JP2005305610A | 2005-11-04 | |||
| JP2018108223A | 2018-07-12 | |||
| JP2018108224A | 2018-07-12 |
Attorney, Agent or Firm:
KIYOHARA Yoshihiro (JP)
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