Title:
CROSS-TIP SCREWDRIVER BIT
Document Type and Number:
Japanese Patent JP2004181612
Kind Code:
A
Abstract:
To solve the problem wherein a shape of a publicly known cross-tip screwdriver bit allows a screw, a machine screw and the bit to easily slip out of a fitting groove at threadably attaching work.
A recessed groove up to 2.0 mm to 5.0 mm is successively arranged from the tip of a blade in the depth of the fitting groove of the screw and the bit. Grounding surfaces with the screw and the machine screw are formed in a plane shape to prevent slipping-out of a bit tip part from the fitting groove and collapse of a screw groove.
Inventors:
OTA MASARU
Application Number:
JP2002383059A
Publication Date:
July 02, 2004
Filing Date:
December 05, 2002
Export Citation:
Assignee:
AMESUTEI KK
International Classes:
B25B15/00; (IPC1-7): B25B15/00