Title:
CORE DRILL
Document Type and Number:
WIPO Patent Application WO/2018/052118
Kind Code:
A1
Abstract:
Provided is a core drill capable of reducing powder dust that scatters outward during drilling work, even on a drilling spot having, at a location immediately near thereto, a wall or the like vertical to the surface to be drilled. An exemplary core drill according to the present invention is provided with: a shaft part (1) including a shank; a blade body part (2) including a cylindrical section (21) fixed to the front portion of the shaft part (1) and including a cutting blade (22) disposed at the leading edge of the cylindrical section; and a dust suction adapter (4) including a fitting part (4a) that is penetrated by the shaft part (1) and that is rotatably attached relatively to the shaft part (1), and including a suction port (4b) which is joined to the fitting part and which is connected to a suction hose, wherein a dust suction passage (15) is provided inside the shaft part (1), a discharge port (16) which is connected with the dust suction passage (15) is provided on a side surface of the shaft part (1), and the dust suction adapter (4) is configured in such a way that the suction port (4b) and the discharge port (16) of the shaft part (1) are always connected in a state where the shaft part (1) is relatively rotating with respect to the fitting part (4a).
Inventors:
MIYANAGA MASAAKI
Application Number:
PCT/JP2017/033472
Publication Date:
March 22, 2018
Filing Date:
September 15, 2017
Export Citation:
Assignee:
KK MIYANAGA (JP)
International Classes:
B23B51/04; B23Q11/00; B27C3/08; B27G3/00; B28D1/14; E21B10/02
Domestic Patent References:
| WO1988004588A1 | 1988-06-30 |
Foreign References:
| JPH05502917A | 1993-05-20 | |||
| JPH0525985A | 1993-02-02 | |||
| JP2001198916A | 2001-07-24 | |||
| JP2001349167A | 2001-12-21 | |||
| EP1447194A1 | 2004-08-18 | |||
| US20150165530A1 | 2015-06-18 |
Attorney, Agent or Firm:
PATENT CORPORATE BODY ARCO PATENT OFFICE (JP)
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