Screw driver and screw head system

Details Screw driver and screw head system Screw driver and screw head system

B - Operations, Transporting

25

B

85/102, 81/29

B25B 15/02 (2006.01) F16B 35/00 (2006.01)

Patent

CA 1167293

Abstract of the Disclosure A screw driver has a handle, shaft and blade with the bottom edge of the blade being flat and having flat sides which include inwardly from the bottom edge. To turn the screw, the screw driver is placed with its bottom edge in the gap between protruding (raised) quadrant sectors of the screw head and turned 45°. The flat inwardly inclined sides of the screw driver act against cut-back flat sides of the pro- truding sectors to cam the screw driver toward the screw head and rotate the screw.

392204

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