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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2007/129572
Kind Code:
A drill having a vibration exciting device (A) for applying vibration to the direction of the axis of a drill bit (4) of the drill, a detection device (21) for detecting the rotational speed of the drill bit (4), and a control section (20) for controlling rotation of the drill bit (4) based on the result of the detection by the detection device (21). Upon recognizing that a rotational speed reduction of the drill bit (4) occurring after the rotational speed is increased has continued for a predetermined time period, the control section (20) starts operation of the vibration exciting device (A).

KOBAYASHI, Tsuyoshi (())
Application Number:
Publication Date:
November 15, 2007
Filing Date:
April 24, 2007
Export Citation:
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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)
International Classes:
B23B45/16; B28D1/14
Attorney, Agent or Firm:
OGURI, Shohei et al. (Eikoh Patent Office, 7-13 Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, 1050003, JP)
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