Screwdriver

Details Screwdriver Screwdriver

1981-12-07

1984-03-06

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

B25B 1500

Patent

active

044346883

ABSTRACT:
An improved screwdriver that will not slip out of a screw head, having a screw head receiving element secured to a screwdriver shank. The screw head receiving element is provided with a screwdriver blade and is adapted to receive at least a portion of a screw head of an appropriately sized screw such that the blade can slide in a screw head slot only until said screw head rests against a surface of the screw head receiving element. Preferably, the blade utilized has parallel faces instead of the normally tapered faces of a standard screwdriver so that the inside edges of the screw head slot are not damaged during use of the screwdriver.

REFERENCES:
patent: 1009248 (1911-11-01), Jenkins
patent: 1686681 (1928-10-01), Canode
patent: 2637229 (1953-05-01), Lee
patent: 2782822 (1957-02-01), Clark
patent: 2794462 (1957-06-01), Frykman
patent: 3135306 (1964-06-01), Mangerian
patent: 3608596 (1971-09-01), Yoho
patent: 4285255 (1981-08-01), Winfrey

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