Screwdriver

Details Screwdriver Screwdriver

1986-04-18

1987-07-21

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

81436, 7108, 140149, B25B 2310

Patent

active

046809961

ABSTRACT:
A screwdriver having its blade end rotated slightly about its longitudinal axis and also provided with arcuate cutouts at the rotation, so that the combination of these two structural features provides an aligning edge that remains in the observation of the user and facilitates placement of the screw-turning edge in the slot of a screw head.

REFERENCES:
patent: 942742 (1909-12-01), Presson
patent: 2501217 (1950-03-01), Hawn
patent: 2632488 (1953-03-01), Becker
patent: 3095912 (1963-07-01), Sullivan

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