Title:
CORE DRILL
Document Type and Number:
WIPO Patent Application WO/2010/084551
Kind Code:
A1
Abstract:
Provided is a core drill capable of holding a cut-out core in the hollow portion of the drill body so as to prevent the cut-out core from falling down. The core drill (A) of the present invention comprises a cylindrical drill body (1), cutting teeth (2) arranged at the lower end of the drill body (1) and a shank (4)disposed at the upper end of the drill body (1) to be held by a drilling machine. The core drill is further provided with a yieldable pressing member (6) disposed in the hollow portion of the core drill (1) projecting radially inwardly and yieldable radially outwardly.
Inventors:
MIYANAGA, Masaaki (())
Application Number:
JP2009/006961
Publication Date:
July 29, 2010
Filing Date:
December 17, 2009
Export Citation:
Assignee:
KABUSHIKI KAISHA MIYANAGA (2393, Fukui Miki-sh, Hyogo 33, 〒6730433, JP)
株式会社ミヤナガ (〒33 兵庫県三木市福井２３９３番地 Hyogo, 〒6730433, JP)
株式会社ミヤナガ (〒33 兵庫県三木市福井２３９３番地 Hyogo, 〒6730433, JP)
International Classes:
B23B51/04
Attorney, Agent or Firm:
PATENT CORPORATE BODY ARCO PATENT OFFICE (3rd Fl, Bo-eki Bldg. 123-1, Higashimachi, Chuo-ku, Kobe-sh, Hyogo 31, 〒6500031, JP)
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