Slot screwdriver

Details Slot screwdriver Slot screwdriver

1992-04-16

1993-11-09

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

81460, 81900, B25B 1348

Patent

active

052592790

ABSTRACT:
A slot screwdriver with convex wide-side surfaces of the blade (3, 19) on its working end (8, 20) and, in order to optimize the use thereof, it proposes that the convexity be formed of two convex arcs (10, 21) present on each wide-side surface and lying symmetrically on both sides of the transverse center plane (A--A) of the blade (3, 19).

REFERENCES:
patent: 2193477 (1940-03-01), De Vellier
patent: 3013929 (1961-12-01), Reiling
patent: 3120251 (1964-02-01), York
patent: 3592247 (1971-07-01), Solf
patent: 4016912 (1977-04-01), St-Amour
patent: 4625598 (1986-12-01), Wolfram
patent: 4938731 (1990-07-01), Nguyen et al.
patent: 5001948 (1991-03-01), Weible et al.

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