Interlocking lock screw with screw driver

Details Interlocking lock screw with screw driver Interlocking lock screw with screw driver

1984-05-30

1986-02-25

Dorner, Kenneth J.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

411140, 411373, 411407, B25B 1500

Patent

active

045720398

ABSTRACT:
An interlocking lock screw and screwdriver which prevents the specially designed screwdriver blade with guide dimples from slipping out of a specially designed screw head with a screwdriver guide channel and guide dimple entry apertures. The screwdriver may be used in any position including sideways and directly overhead. A rotational locking system is provided which allows a user to drive a staple or brad through the screw head locking it in place or a decorative locking cap may be used. A decorative non-locking cap is also provided which is easy to install yet easily stays in place.

REFERENCES:
patent: 7124 (1876-05-01), Nunn
patent: 1184173 (1916-05-01), Gehring
patent: 1296165 (1919-03-01), Costuma
patent: 1548297 (1925-08-01), Wintrob
patent: 1677607 (1928-07-01), Wood
patent: 1797390 (1931-03-01), Wood
patent: 1997422 (1935-04-01), Lorenzen
patent: 3695321 (1972-10-01), Garehime
patent: 4130152 (1978-12-01), Bolen
patent: 4339971 (1982-07-01), Zatorre

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