Title:
SCREW DRIVER BIT AND COMBINATION THEREOF WITH SCREW
Document Type and Number:
WIPO Patent Application WO/2004/065067
Kind Code:
A1
Abstract:
A screw driver bit and a combination thereof with screws allowing the smooth fitting of the screw driver bit to a bit fitting groove, capable of surely preventing come-out trouble from occurring, capable of preventing a screw from being damaged at the bit fitting groove as in a conventional screw driver bit, and capable of achieving correct and rapid screw mounting and dismounting operations at all times even if the bit fitting groove is damaged to remarkably increase working efficiency, the screw driver bit comprising a generally flat-shaped blade part (32) having a tilted end edge part (34) with a specified tilted angle (&gammad ) formed at the tip part of the screw driver bit and fitted along the tilted groove part of the bit fitting groove at a screw head part. A plurality of projected edge parts (36A), (36B), and (36C) formed of end edge parts (35a) which are generally parallel with a bit shaft (B) and projected outward from the tilted surface (L) of the tilted end edge parts and crossed edge parts (35b) crossing the end edge parts (35a) at oblique or acute angles are provided stepwise in turn at the tilted end edge parts (34) of the blade part (32).
Inventors:
TOTSU KATSUYUKI (JP)
Application Number:
PCT/JP2004/000228
Publication Date:
August 05, 2004
Filing Date:
January 15, 2004
Export Citation:
Assignee:
TOTSU KATSUYUKI (JP)
International Classes:
B25B15/00; F16B23/00; (IPC1-7): B25B15/00; F16B23/00
Foreign References:
US4151621A | 1979-05-01 | |||
JPH11311226A | 1999-11-09 | |||
JP2003013924A | 2003-01-15 | |||
DE19537992A1 | 1997-04-17 |
Attorney, Agent or Firm:
Honda, Takashi (1-17 Akasaka 1-chom, Minato-ku Tokyo, JP)
Download PDF:
Previous Patent: A ADJUSTABLE WRENCH FOR ADJUSTING THE WIDTH OF THE JAW QUICKLY
Next Patent: A TORQUE TOOL
Next Patent: A TORQUE TOOL