Title:
NONCORING DRILL BIT
Document Type and Number:
WIPO Patent Application WO/2008/018559
Kind Code:
A1
Abstract:
A noncoring drill bit has a washer (2) attached to the head of a shank of a boring
tool, a circular column-like first diamond grindstone body (3) fixed to the washer
(2) and having cutout recess (10) open to one side, and a second diamond grindstone
body (4) placed in the cutout recess (10). The head of the second diamond grindstone
body (4) is located on the washer (2) side of the head of the first diamond grindstone
body (3). The inner side of the head surface of the first diamond grindstone body
(3) is preferably formed as a recess with a substantially mortar-like shape.
More Like This:
Inventors:
NONAKA, Takuma (())
野中 琢磨 (())
MURAKAMI, Naohide (())
野中 琢磨 (())
MURAKAMI, Naohide (())
Application Number:
JP2007/065652
Publication Date:
February 14, 2008
Filing Date:
August 09, 2007
Export Citation:
Assignee:
MAX CO., LTD. (6-6 Nihonbashi hakozaki-cho, Chuo-ku Tokyo, 02, 1038502, JP)
マックス株式会社 (〒02 東京都中央区日本橋箱崎町６番６号 Tokyo, 1038502, JP)
Unika Company Limited (10-6, Iwamoto-cho 2-chome Chiyoda-k, Tokyo 32, 1010032, JP)
ユニカ株式会社 (〒32 東京都千代田区岩本町２丁目１０番６号 Tokyo, 1010032, JP)
NONAKA, Takuma (())
マックス株式会社 (〒02 東京都中央区日本橋箱崎町６番６号 Tokyo, 1038502, JP)
Unika Company Limited (10-6, Iwamoto-cho 2-chome Chiyoda-k, Tokyo 32, 1010032, JP)
ユニカ株式会社 (〒32 東京都千代田区岩本町２丁目１０番６号 Tokyo, 1010032, JP)
NONAKA, Takuma (())
International Classes:
B28D1/14; B24D7/18
Attorney, Agent or Firm:
OGURI, Shohei et al. (Eikoh Patent Office, 7-13 Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, 1050003, JP)
Download PDF: