Tools – Wrench – screwdriver – or driver therefor – Having work engaging and force exerting portion inserted...
Reexamination Certificate
1999-10-29
2001-05-01
Meislin, D.S. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Having work engaging and force exerting portion inserted...
C279S079000, C081S439000
Reexamination Certificate
active
06223633
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a hand tool, and more particularly to a screwdriver.
BACKGROUND OF THE INVENTION
There are a variety of conventional screwdrivers, which are provided with various tips to use on a variety of screw heads. As a result, a worker has to carry a number of screwdrivers. This hampers the movement of the worker at the work site.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a screwdriver, which comprises a handle having a control portion for fastening detachably a tip in conjunction with two retaining members and a position confining block.
The foregoing objective, feature, and function of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
REFERENCES:
patent: 4581961 (1986-04-01), Lai
patent: 5964132 (1999-10-01), Chen
Harrison & Egbert
Meislin D.S.
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