Interlocking screw and screwdriver

Details Interlocking screw and screwdriver Interlocking screw and screwdriver

1989-03-09

1990-06-26

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

81460, B25B 2310

Patent

active

049361724

ABSTRACT:
A screwdriver and mating screw are shown with interlocking features for coupling with one another to facilitate driving the screw into a workpiece. The screwdriver includes a handle and a blade with an engagement flange on the outer extremity of the blade. The engagement flange engages a complementary recess provided in the head of the mating screw, the recess including a downwardly facing shoulder. A coupling sleeve mounted on the blade exerts an axially directed force on the screw once the engagement flange and complementary recess are engaged to thereby interlock the screwdriver and mating screw.

REFERENCES:
patent: 3120251 (1964-02-01), York
patent: 3392767 (1968-07-01), Stillwagon
patent: 3463209 (1969-08-01), Podolsky
patent: 3675694 (1972-07-01), Barlow
patent: 3695321 (1972-10-01), Garehime, Jr.
patent: 3888144 (1975-06-01), Parsons
patent: 4033244 (1977-07-01), Jacobson
patent: 4037514 (1977-07-01), Lliteras
patent: 4038757 (1977-08-01), Hicks et al.
patent: 4128038 (1978-12-01), Urwin
patent: 4130152 (1978-12-01), Bolen
patent: 4269246 (1981-05-01), Larson et al.
patent: 4526071 (1985-07-01), Post
patent: 4648293 (1987-03-01), McCauley

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