Handling: hand and hoist-line implements – Hand bars and hand barrows – Opposing jaws
Reexamination Certificate
2001-05-30
2002-09-03
Kramer, Dean J. (Department: 3652)
Handling: hand and hoist-line implements
Hand bars and hand barrows
Opposing jaws
C294S902000, C081S423000, C269S282000
Reexamination Certificate
active
06443515
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a holding wrench that can be used to mate with rotation workpieces of different structures.
2. Description of the Related Art
A first conventional holding wrench in accordance with the prior art shown in
FIGS. 1-3
comprises a main plate
1
having a first end provided with a handle
101
and a second end formed with a jaw
102
defining a snap recess
1022
, a secondary plate
2
having a first end pivoted to the main plate
1
and a second end formed with a jaw
201
defining a snap recess
2012
.
In operation, referring to
FIGS. 2 and 3
, the wheel axle
301
of the fan blade wheel
3
is provided with a belt wheel
4
which drives the fan blade wheel
3
to rotate. The distal end of the wheel axle
301
passes through the belt wheel
4
and is screwed by a nut
3011
. The belt wheel
4
is provided with a plurality of lugs
401
. When the operator wishes to detach the fan blade wheel
3
, the jaws
102
and
201
are locked on two opposite lugs
401
which are retained in the snaps recesses
1022
and
2012
, thereby controlling the belt wheel
4
and the fan blade wheel
3
. Then, the nut
3011
can be driven by another wrench to rotate relative to the wheel axle
301
, thereby unscrewing the nut
3011
, and further detaching the fan blade wheel
3
.
A second conventional holding wrench in accordance with the prior art shown in
FIGS. 4 and 5
comprises a main plate
5
having a first end provided with a handle
501
and a second end formed with two opposite jaws
503
each provided with an insertion pin
504
.
In operation, referring to
FIG. 5
, the holding wrench can be used to assemble and dismantle a rotation workpiece
6
having a larger diameter such as the belt wheel, sprocket or the like. The rotation workpiece
6
is formed with a plurality of slots
601
. When the operator wishes to detach the rotation workpiece
6
, the insertion pins
504
can be inserted into two opposite slots
601
, thereby positioning the rotation workpiece
6
. Then, the screw or nut on the rotation workpiece
6
can be driven by another wrench to rotate relative to the rotation workpiece
6
, thereby unscrewing the screw or nut and thereby further detaching the rotation workpiece
6
. However, the operator has to prepare multiple tools so as to satisfy the various requirements of the working process, thereby causing inconvenience to the operator in use.
SUMMARY OF THE INVENTION
The present invention has arisen to mitigate and/or obviate the disadvantage of the conventional holding wrench.
The primary objective of the present invention is to provide a holding wrench that can be used to mate with rotation workpieces of different structures.
In accordance with the present invention, there is provided a holding wrench comprising:
a body, the body including a first arm plate and a second arm plate, the first arm plate having a first end provided with a handle and a second end defining a first screw hole, the second arm plate having a first end pivotally mounted on a mediate portion of the first arm plate and a second end defining a second screw hole;
a first holding assembly selectively secured on the body and including two symmetric first holding members each having a first end selectively and releasably secured on the second end of the first arm plate and the second arm plate, and each having a second end defining a snap recess, the snap recesses of the two first holding members facing each other, the first end of each of the two first holding members defining a through hole aligning with the first screw hole of the first arm plate and the second screw hole of the second arm plate respectively, two locking bolts each respectively extended through the through hole of each of the two first holding members, and each respectively screwed into the first screw hole of the first arm plate and the second screw hole of the second arm plate, thereby securing the two first holding members to the first arm plate and the second arm plate respectively; and
a second holding assembly selectively secured on the body and including two second holding members each having a threaded post selectively screwed into the first screw hole of the first arm plate and the second screw hole of the second arm plate respectively, thereby selectively securing the two second holding members to the first arm plate and the second arm plate respectively, the threaded post of each of the two second holding members having a first end provided with an enlarged head rested on a first side of the first screw hole of the first arm plate and the second screw hole of the second arm plate respectively, and having a second end formed with an insertion stub protruded outward from a second side of the first screw hole of the first arm plate and the second screw hole of the second arm plate respectively.
REFERENCES:
patent: 3010347 (1961-11-01), Kron
patent: 5070564 (1991-12-01), Fey
patent: 5469766 (1995-11-01), Hodges
patent: 5647625 (1997-07-01), Sawdon
patent: 5884540 (1999-03-01), Mo
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