Title:
DRIVER BIT
Document Type and Number:
Japanese Patent JP2001347467
Kind Code:
A
Abstract:
To provide a driver bit capable of sufficiently relieving the impact in fastening with simple working.
As a bit shaft 3 is provided with a hollow part 5 formed by a through hole 6, the impact received in the completion of fastening can be relieved by the hollow part 3a, and the impact to a driving blade 2 can be reduced, whereby the fracture of the driving blade 2 can be prevented. In this invention, as plural through holes 6 are formed in plural stages, a part having low rigidity is dispersed over a predetermined length, whereby the impact in fastening can be dispersed, and the fracture of the hollow part 3a can be prevented.
Inventors:
Takahashi, Minoru
Application Number:
JP2000000169670
Publication Date:
December 18, 2001
Filing Date:
June 06, 2000
Export Citation:
Assignee:
NITTO SEIKO CO LTD
International Classes:
B25B15/00; B25B15/00; (IPC1-7): B25B15/00