Screw and driver system

Details Screw and driver system Screw and driver system

1996-12-31

1999-02-09

Scherbel, David A.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

B25B 2300

Patent

active

058680497

ABSTRACT:
A new Screw & Driver System for providing a way for releasably securing a driver to the head of a screw such that the driver cannot be lifted straight up and out of the screw. The inventive device includes a screw and a driver therefore. The screw has a head with an hourglass-shaped driver receiving cavity. The hourglass-shaped driver receiving cavity includes a middle section and a pair of opposed wedge-shaped sections extending from the middle section. The pair of opposed wedge-shaped sections have undercut sidewalls. The driver includes a tool element having an hourglass-shaped end wherein the hourglass-shaped end of the tool element has shoulder surfaces which cooperably engage and lockingly mate with the undercut sidewalls of the pair of opposed wedge-shaped sections when the driver and the screw are in working engagement.

REFERENCES:
patent: 2397216 (1946-03-01), Stellin
patent: 3872904 (1975-03-01), Barlow
patent: 4538486 (1985-09-01), Lutrat
patent: 5438895 (1995-08-01), Bassell et al.

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