Title:
TORSION DRIVER BIT
Document Type and Number:
WIPO Patent Application WO/2018/190441
Kind Code:
A1
Abstract:
Provided is a torsion driver bit which: is made of a hexagonal-rod; has bit blade (2) parts formed in the shape of a cross, a straight line, etc. at both ends thereof so as to be fitted in a head groove of a screw nail to allow the transfer of a rotation force; has a middle body (1) part connected to the both bit blade (2) parts with both narrow neck (8) parts interposed therebetween, respectively; and has a structure in which, when torque is excessively transferred to the middle body (1) part, the middle body (1) part is twisted in the longitudinal direction thereof to disperse the torque over time so as to reduce the maximum momentary impact amount applied to ends of the bit blades, thereby preventing the bit blades from being broken, wherein multiple linear grooves (3) are cut in the longitudinal direction according to elasticity and strength required for a body torsion section (1) such that the torsion section (1) has improved elasticity with respect to torsion and maintains strength with respect to bending as it is.
Inventors:
KIM JIN SOO (KR)
Application Number:
PCT/KR2017/003891
Publication Date:
October 18, 2018
Filing Date:
April 11, 2017
Export Citation:
Assignee:
KIM JIN SOO (KR)
International Classes:
B25B15/00; B25B19/00
Foreign References:
| JP2002018739A | 2002-01-22 | |||
| JP3128497U | 2007-01-18 | |||
| JP2002321160A | 2002-11-05 | |||
| CN104440741A | 2015-03-25 | |||
| JP2014151374A | 2014-08-25 | |||
| KR20170107218A | 2017-09-25 |
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