Title:
WOODWORKING GIMLET FOR LARGE HOLE
Document Type and Number:
Japanese Patent JP3940716
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To realize a woodworking gimlet for a large hole capable of boring a large aperture deep hole.
SOLUTION: A plurality of arm members 2 and 2 are laterally protruded from a center shaft part 1 and marking-off blades 3 and 3 are arranged on the outer peripheral edge loci of the arm members. The regions of marking-off blades 3 of the outer peripheral edge loci are cut off from the center of rotation by arranging scooping blades 4 and 4 to the respective front end parts of the arm members so as to differentiate cut-off regions. The side end parts of the leading ends of the scooping blades 4 are cut in an inclined state to form inclined cutting blades 5. Produced cut refuse is entangled with the arm members in a cleanly cut state to bore a large aperture deep hole without obstructing the cutting of the scooping blades.
Inventors:
Hiroshi Kobayashi
Application Number:
JP2003349100A
Publication Date:
July 04, 2007
Filing Date:
October 08, 2003
Export Citation:
Assignee:
Kobayashi Gymne Co., Ltd.
International Classes:
B23B51/00; B27G15/00; (IPC1-7): B27G15/00; B23B51/00
Domestic Patent References:
| JP2001030106A | ||||
| JP60164005U | ||||
| JP639933Y2 |
Attorney, Agent or Firm:
Kunihiko Fujita
Susumu Fukuda
Norihiko Fujita
Susumu Fukuda
Norihiko Fujita