Title:
SCREWDRIVER BIT
Document Type and Number:
WIPO Patent Application WO/2011/092969
Kind Code:
A1
Abstract:
Provided is a screwdriver bit configured in such a way that when the tip of the screwdriver bit is to be fitted into a bit fitting groove of a screw, said bit fitting groove being formed on the top surface of the head of the screw, then damage is prevented from occurring on the top surface of the head of the screw, and proper fitting of the tip of said bit into the bit fitting groove is promptly and smoothly accomplished, with the result that the efficiency and safety of screw tightening work are significantly enhanced. This driver bit (30) is provided with a cross-shaped tip edge which is to be fitted into the bit fitting groove provided on the top surface of the head of the screw, said bit fitting groove consisting of a cross-shaped groove. In this driver bit (30), the tip surface of said tip edge (31) is formed as a whole into a spherical surface shape (34) by means of planishing.
More Like This:
| JP2013522560 | Drive body for rotary drive |
| JPS59183365 | [Title of the device] Driver |
Inventors:
TOTSU KATSUYUKI (JP)
Application Number:
PCT/JP2010/072863
Publication Date:
August 04, 2011
Filing Date:
December 20, 2010
Export Citation:
Assignee:
TOTSU KATSUYUKI (JP)
International Classes:
B25B15/00
Foreign References:
| JP2007002880A | 2007-01-11 | |||
| JPH09508323A | 1997-08-26 | |||
| JP2009502543A | 2009-01-29 | |||
| JP2000167776A | 2000-06-20 | |||
| JP2001179643A | 2001-07-03 |
Other References:
See also references of EP 2529889A4
Attorney, Agent or Firm:
HONDA TAKASHI (JP)
Takashi Honda (JP)
Takashi Honda (JP)
Download PDF:
Claims:
Previous Patent: SEMICONDUCTOR DEVICE AND ELECTRONIC APPARATUS EMPLOYING SAME
Next Patent: BODY POSITION/BODY PRESSURE CONTROL DEVICE
Next Patent: BODY POSITION/BODY PRESSURE CONTROL DEVICE