Woodworking – Work guide – Vertical spindle
Reexamination Certificate
2000-07-20
2002-01-22
Bray, W. Donald (Department: 3725)
Woodworking
Work guide
Vertical spindle
C144S135200, C144S286500, C269S055000, C269S249000, C269S279000, C269S2890MR, C269S292000
Reexamination Certificate
active
06340039
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention is related to an improvement in the structure of a worktable for a wood carving machine and in particular to one having a positioning device and a clamping device on the worktable which can facilitate the positioning of a workpiece.
2. Description of the Prior Art As shown in
FIGS. 1 and 2
, the conventional worktable
11
for a wood carving machine utilizes an adjust bolt
12
, two stationary brackets
13
, a movable bracket
14
, an adjust screw rod
15
and a positioning device
16
to adjust the position of a workpiece. In addition, the positioning device
16
is formed with a hole
17
on which is mounted a holding device
20
. The holding device
20
comprises an L-shaped rod
21
, a rectangular block
22
and a spring leaf
23
. The spring leaf
23
is disposed above the worktable
11
for holding a workpiece being processed. However, the positioning device
16
can only be moved to and fro and cannot be used for adjusting the carving angle and the inclination of the workpiece, thereby limiting the processing range and method and therefore causing much inconvenience in operation.
Therefore, it is an object of the present invention to provide an improvement in the structure of a worktable for a wood carving machine which can obviate and mitigate the above-mentioned drawbacks.
SUMMARY OF THE INVENTION
This invention is related to an improvement in the structure of a worktable for a wood carving machine and in particular to one having a positioning device and a clamping device on the worktable which can facilitate the positioning of a workpiece.
It is the primary object of the present invention to provide an improvement in the structure of a worktable for a wood carving machine which utilizes a U-shaped recess on the top of a sleeve to mount a clamping device for keeping a workpiece in place.
It is another object of the present invention to provide an improvement in the structure of a worktable for a wood carving machine which includes a clamping device having a supporting arm provided at the rear side with an eccentric roller adapted for sliding on an upper edge of a positioning device.
It is a further object of the present invention to provide an improvement in the structure of a worktable for a wood carving machine having a holder which can be moved up and down along a rod and rotated with respect to a cross-shaped sleeve for holding a workpiece in place.
The foregoing objects and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts. Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.
REFERENCES:
patent: 2076511 (1937-04-01), Hedgpeth
patent: 2799305 (1957-06-01), Groehn
patent: 5042542 (1991-08-01), Purviance
patent: 5205198 (1993-04-01), Foray et al.
patent: 5452752 (1995-09-01), Aigner
A & J
Bray W. Donald
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