Hand-held spin-type driver tool

Details Hand-held spin-type driver tool Hand-held spin-type driver tool

1975-02-14

1976-05-11

Smith, Al Lawrence

Tools

Wrench, screwdriver, or driver therefor

Handle or shank

145 61C, B25B 1300, B25G 312

Patent

active

039554511

ABSTRACT:
A new form of assembly for a high torque capability spin-type driver tool is disclosed. The tool has a shaft of uniform cross-sectional dimension with an elongated segment of substantially reduced cross-sectional dimension or shape at one end. A plurality of fin-shaped members extend radially outward along the reduced cross-sectional portion to provide a coupling for applying the turning force or torque to the shaft. The shaft is adapted for use with handled driver tools, such as screwdrivers and nutdrivers as well as with power driving tools. The reduced cross-sectional dimension segment and fin-shaped members present an axially smooth surface about which a press-fitted handle grip will contiguously engage. The fin-shaped members prevent the handle grip from slipping rotationally about the shaft in the presence of torsional forces.

REFERENCES:
patent: 871154 (1907-11-01), Wood
patent: 1660537 (1928-02-01), Waskom
patent: 2015430 (1935-09-01), Matthews et al.
patent: 3292678 (1966-12-01), Noga
patent: 3405748 (1968-10-01), Sorteberg
patent: 3592247 (1971-07-01), Solf

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