Title:
CONCRETE DRILL
Document Type and Number:
WIPO Patent Application WO/2003/061928
Kind Code:
A1
Abstract:
A concrete drill having a bit drive shaft (4) adapted to be driven for rotation by a drive source (2) received in a main body (1) to drill concrete or the like by a diamond bit (5) attached to the front end of the bit drive shaft (4) projecting forwardly of the main body (1), wherein the main body (1) is provided with a vibration applying device (8) for imparting a vibration imparting force, whose magnitude pulsatively varies, to the main body (1) along the bit drive shaft (4).
Inventors:
AGEHARA KIGEN (JP)
AKATSU MOTOSHIGE (JP)
MURAKAMI NAOHIDE (JP)
AKATSU MOTOSHIGE (JP)
MURAKAMI NAOHIDE (JP)
Application Number:
PCT/JP2003/000222
Publication Date:
July 31, 2003
Filing Date:
January 14, 2003
Export Citation:
Assignee:
MAX CO LTD (JP)
AGEHARA KIGEN (JP)
AKATSU MOTOSHIGE (JP)
MURAKAMI NAOHIDE (JP)
AGEHARA KIGEN (JP)
AKATSU MOTOSHIGE (JP)
MURAKAMI NAOHIDE (JP)
International Classes:
B28D1/14; B25D11/00; B25D16/00; B28D7/00; (IPC1-7): B28D1/14
Foreign References:
| JPH0482609A | 1992-03-16 | |||
| JPH01260107A | 1989-10-17 | |||
| JPH07308476A | 1995-11-28 | |||
| JPS6061637U | 1985-04-30 | |||
| US5733074A | 1998-03-31 |
Other References:
See also references of EP 1468802A4
Attorney, Agent or Firm:
Oguri, Shohei (28th Floor ARK Mori Building, 12-32, Akasaka 1-chom, Minato-ku Tokyo, JP)
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