High torsion screwdriver

Details High torsion screwdriver High torsion screwdriver

1996-02-07

1997-07-29

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

81 631, B25B 1346

Patent

active

056512945

ABSTRACT:
A screwdriver includes a seater which is formed with an axially extending polygonal hole that is defined by a plurality of curved locking sides, and a positioning member which has an annular rotary plate and a tubular portion that extends from the rotary plate and that is disposed in the polygonal hole. Each of the locking sides forms a curved clearance with the tubular portion. The clearance has two tapering end sections and a wide intermediate section. The tubular portion is formed with a plurality of axially extending positioning slits adjacent to the locking sides, respectively. A plurality of cylindrical locking rods are disposed respectively in the positioning slits. A drive shaft extends through the positioning member and the seater and contacts the locking rods.

REFERENCES:
patent: 5406866 (1995-04-01), Badiali
patent: 5499559 (1996-03-01), Lin

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