Tools – Wrench – screwdriver – or driver therefor – Pivoted outer jaw
Reexamination Certificate
2001-03-30
2002-05-14
Meislin, D. S. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Pivoted outer jaw
Reexamination Certificate
active
06386073
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a wrench that has a pivotal jaw and a fixed jaw. The pivotal jaw is pushed by a spring in the handle so as to easily adjust the width between the two jaws.
BACKGROUND OF THE INVENTION
A conventional open ended wrench is shown in FIG.
1
and generally includes a handle
100
with a head
102
connected to an end of the handle
100
. The head
102
has a slot
103
defined therein so as to form two jaws
104
,
105
. The width between the two jaws
104
,
105
is designed to embrace an object to let two of multiple sides of the object respectively contact the two jaws
104
,
105
. Therefore, when rotating the handle
100
, the object is rotated by the two jaws
104
,
105
. The width between the two jaws
104
,
105
cannot be adjusted so that the users have to prepare many wrenches with different sizes. If the head of the object is rounded, the conventional wrench cannot hold the object properly.
The present invention intends to provide a wrench which width between jaws can be adjusted so as to easily embrace different sizes of objects.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a wrench comprising a handle with a first jaw and a protrusion respectively extending from an end thereof and a surface is connected between the protrusion and the first jaw. A recess is defined in the surface and a spring has a first end received in the recess. A pivotal member is pivotally connected to the protrusion by a pin and has a groove defined in a periphery thereof so as to receive the protrusion and the surface. A second jaw extends from the pivotal member and an end plate ends the groove. A gap is defined between the end plate and the second jaw. A second end of the spring biases the end plate.
The primary object of the present invention is to provide a wrench wherein one of the jaws of the wrench is pivotally connected to the handle and the width between the two jaws can be easily adjusted.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
REFERENCES:
patent: 2618996 (1952-11-01), Logan
patent: 3309949 (1967-03-01), Neff
patent: 5996445 (1999-12-01), Wiens et al.
patent: 6167784 (2001-01-01), Lin
Meislin D. S.
Pro-Techtor Inter-national Services
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