Stone working – Sawing – Rotary
Reexamination Certificate
2002-11-13
2004-01-20
Morgan, Eileen P. (Department: 3723)
Stone working
Sawing
Rotary
C125S035000, C451S360000
Reexamination Certificate
active
06679244
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to stone cutters and more particularly to a structurally improved stone cutter.
As we know that the stone cutter is an indispensable tool to the architectural and civil engineering workers. A prior art stone cutter of mine, U.S. Pat. No. 6,263,866B1 (as shown in
FIGS. 1
,
2
and
3
) comprises generally a sink
11
, a frame
12
, a platform
13
, a motor
14
and a saw blade
15
. The frame
12
has a rectangular body including a guide rod
121
and a rail plate
122
. The platform
13
has a tubular slider
131
on underside and a L-shaped positioning plate
132
. The tubular slider
131
has a pair of annular caps
1311
each of which has a plurality of longitudinal stripes
1313
on inner periphery for improving the smooth sliding of the tubular slider
131
. The motor is disposed in a housing
16
and has an axis to actuate the saw blade
15
which is protected by a releasable casing
17
. Although this type of annular caps
1311
has an advantage to facilitate the smooth sliding of the platform
13
. However, due to the tightly sealed tubular slider
131
, the air inside the tubular slider
131
will cause a transient resistant force to the sliding movement. Besides, the prior art stone cutter fixes its power transmission shaft in a casing which causes difficult to change the bearings therein and has poor radiation. Further, the tools and material has no place to put. These problems need to be solved.
SUMMARY OF THE PRESENT INVENTION
The present invention has a main object to provide a structurally improved stone cutter in which there is no transient resistant force to obstruct the smooth sliding of the platform.
Another object of the present invention is to provide a structurally improved stone cutter in which the tubular shaft is readily to assemble or disassemble and the bearings therein are easy to be replaced.
Still another object of the present invention is to provide a structurally improved stone cutter in which a fan cap has a fan therein to provide a good radiation function.
Further object of the provide invention is to provide a structurally improved stone cutter which has a working station to facilitate the placing of tools and raw materials.
REFERENCES:
patent: 5676124 (1997-10-01), Lee
patent: 5746193 (1998-05-01), Swan
patent: 6000387 (1999-12-01), Lee
patent: 6263866 (2001-07-01), Tsao
patent: 6439218 (2002-08-01), Hulett
patent: 6494198 (2002-12-01), Chen
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