Title:
THREE-BLADE DRILL
Document Type and Number:
WIPO Patent Application WO/2017/034032
Kind Code:
A1
Abstract:
[Problem] To provide a three-blade drill having cutting edges which do not slip easily and have small cutting resistance. [Solution] Provided is a three-blade drill having three thinning cutting edges, the three-blade drill being characterized in that one or two of the thinning cutting edges pass through a rotational center C of the tip of the cutting edges of the three-blade drill, and the remaining one or two thinning cutting edges do not cover the rotational center C.
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/JP2016/075086
Publication Date:
March 02, 2017
Filing Date:
August 26, 2016
Export Citation:
Assignee:
BIC TOOL CO LTD (JP)
International Classes:
B23B51/00; B23B51/02
Domestic Patent References:
| WO2009135681A1 | 2009-11-12 | |||
| WO2015028431A1 | 2015-03-05 |
Foreign References:
| JP2006000985A | 2006-01-05 | |||
| JPS6078213U | 1985-05-31 | |||
| JP2003505259A | 2003-02-12 | |||
| JP2013525129A | 2013-06-20 | |||
| JP2014522735A | 2014-09-08 |
Attorney, Agent or Firm:
KIYOHARA Yoshihiro (JP)
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