Positive engagement screw driver tool

Details Positive engagement screw driver tool Positive engagement screw driver tool

1985-05-10

1986-12-02

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

81441, B25B 1348

Patent

active

046255982

ABSTRACT:
A screwdriver tool provides positive engagement with screw having a head with a straight slot. An end portion is substantially flat, but is wider at its midpoint than at its ends. A tapering segment extends from the end portion and an engagement area is defined on the side of the segment. Engagement initially occurs at a location intermediate to the ends and midpoint of the end portion. As torque on the screwdriver is increased the engagement extends toward the midpoint and up the side of the segment.

REFERENCES:
patent: 370255 (1887-09-01), Hart
patent: 697836 (1902-04-01), Gorham
patent: 810340 (1906-01-01), Meis
patent: 1479506 (1924-01-01), Kellemen
patent: 1797390 (1931-03-01), Wood
patent: 2676510 (1954-04-01), Hodell
patent: 2684094 (1954-07-01), Lissy
patent: 2804894 (1957-09-01), Rosenburg
patent: 2808087 (1957-10-01), Vaughn
patent: 2936010 (1960-05-01), Ansingh
patent: 2994354 (1961-08-01), Vaughn
patent: 3026920 (1962-03-01), York
patent: 3120251 (1964-02-01), York
patent: 3236275 (1966-02-01), Smith
patent: 3897812 (1975-08-01), Arnn
patent: 3923088 (1975-12-01), Arnn
patent: 4105056 (1978-08-01), Arnn

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