Tools – Tool jaw – With means to immobilize jaws
Reexamination Certificate
2000-05-30
2001-06-05
Meislin, D. S. (Department: 3723)
Tools
Tool jaw
With means to immobilize jaws
C081S314000, C081S423000, C269S006000
Reexamination Certificate
active
06240815
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a hand tool, and more particularly to a workpiece clamping device.
BACKGROUND OF THE INVENTION
As shown in
FIG. 1
, a workpiece clamping device
10
of the prior art comprises two clamping blocks
12
and
13
, which are adjusted by a bolt
11
to facilitate the clamping of a workpiece between the two clamping blocks
12
and
13
. The workpiece is held securely by the clamping blocks
12
and
13
at the time when the handle
14
is pressed against the urging plate
15
. If additional pressure is called for, the press plate
16
is pressed. The prior art device
10
is defective in design in that the workpiece can not be easily held, and that it is rather inconvenient to rotate the blot
11
to open up the two clamping blocks
12
and
13
.
As shown in
FIGS. 2 and 3
, another prior art device
20
comprises a press rod
21
, which must be pressed to actuate the connection rods
22
and
23
so as to force the push rod
24
to extend, thereby causing the locking piece
25
to slant to retain the slide rail
26
. As a result, a workpiece is held between the two clamping blocks
28
and
29
. The prior art device
20
is defective in design in that it can not clamp the workpiece with ease and speed.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a workpiece clamping device which is easy to use.
It is another objective of the present invention to provide a workpiece clamping device capable of clamping the workpiece quickly.
It is still another objective of the present invention to provide a workpiece clamping device capable of clamping the workpieces of various dimensions.
The objectives, features, and advantages of the present invention will be readily appreciated and 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: 1134980 (1915-04-01), Warga
patent: 1616621 (1927-02-01), Hooks
patent: 5231763 (1993-08-01), Laux
Liauh W. Wayne
Meislin D. S.
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