Title:
駆動穴付きねじ及びドライバビット
Document Type and Number:
Japanese Patent JP4205990
Kind Code:
B2
Abstract:
The present invention provides a screw, comprising a screw head having a drive recess and a screw shank having threads and being integrally formed with the screw head, wherein the drive recess includes a plurality of engaging grooves equiangularly radiating from an axis of the screw in plan view, a bottom face of each engaging groove having a steep slope, which is near to the screw shank, and a gentle slope, which is far from the screw shank, for enlarging the engaging area of the engaging grooves.
More Like This:
| WO/2002/000396 | SCREW TOOL AND PRODUCTION METHOD THEREOF |
| JP4638640 | Hand tool with swivel arm |
Inventors:
Toyooka Rimasa
Shinichi Hamano
Shinichi Hamano
Application Number:
JP2003155321A
Publication Date:
January 07, 2009
Filing Date:
May 30, 2003
Export Citation:
Assignee:
Nitto Seiko Co., Ltd.
International Classes:
B25B15/00; F16B23/00
Domestic Patent References:
| JP2003011071A | ||||
| JP2003013924A |