Tools – Wrench – screwdriver – or driver therefor – Rigid jaws
Reexamination Certificate
2002-07-29
2004-02-17
Hail, III, Joseph J. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Rigid jaws
C081S177200, C016S114100
Reexamination Certificate
active
06691595
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to wrenches, and more specifically, to a retractable/folding collapsible wrench.
A variety of wrenches including combination wrenches, hex wrenches, ratchet wrenches, work angle-adjustable wrenches, and etc. have been disclosed for grasping nuts, bolts, etc., and have appeared on the market.
FIGS. 50-52
show different combination wrenches constructed according to the prior art. These conventional wrenches have a fixed length. Because the length of conventional wrenches is not adjustable, they are not suitable for use in a narrow working space. Further, because conventional wrenches are not collapsible, they occupy much storage space when not in use.
SUMMARY OF THE INVENTION
The present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide a wrench, which can be collapsed to reduce space occupation when not in use. According to one aspect of the present invention, the wrench comprises a hollow handle, two driving devices respectively moved in and out of the ends of the hollow handle between the extended position and the received position, and positioning means respectively mounted in the ends of the handle and adapted for securing the driving devices in one of a series of positions. According to another aspect of the present invention, the handle can be made having two handle elements pivoted together.
REFERENCES:
patent: D325864 (1992-05-01), Diego
patent: 5492040 (1996-02-01), Bellas
patent: 6131490 (2000-10-01), Lee
patent: 6370990 (2002-04-01), Lin
patent: 6412374 (2002-07-01), Hsieh
Grant Alvin J.
Hail III Joseph J.
Kamrath Alan D.
Rider Bennett LLP
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