Screw driver of replacer for the driving head

Tools – Wrench – screwdriver – or driver therefor – Having work engaging and force exerting portion inserted...

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Details

811774, B25B 2300

Patent

active

049894803

ABSTRACT:
A screw driver device having a replaceable driving head comprising a hollow driving rod which has a pistol-like handle and a clamper for clamping the driving head. A wheel is inserted into the pistol-like handle and which contains driving heads of several types and is turnable with outside force a light for illumination of the work site is provided. In use, it requires to revert the driving rod with its clamper facing upward and turn and wheel to search a suitable driving head and get it faced direct with a slideway in the driver rod and then revert back the driving rod; thus, the chosen driving head may disengage itself from the wheel by its own gravity or by a striker's striking force the head can run down the slideway to protrude from the clamper. Locking the clamper makes it ready for use.

REFERENCES:
patent: 4572038 (1986-02-01), Graham
patent: 4653356 (1987-03-01), Golden

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