Turning – Lathe
Reexamination Certificate
2002-03-04
2003-06-17
Bishop, Steven C. (Department: 3722)
Turning
Lathe
C082S142000, C142S001000, C474S040000
Reexamination Certificate
active
06578455
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATION
This application claims priority of Taiwanese Application No. 90220198, filed on Nov. 22, 2001.
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a wood lathe, and more particularly to a wood lathe, which includes an output shaft for rotating a workpiece, and an output shaft-driving source, such as a motor, that are disposed respectively on two ends of a table.
2. Description of the Related Art
Referring to
FIGS. 1 and 2
, a conventional wood lathe
10
is shown to include a table
11
, a fixed seat
12
, a coupling rod
13
, a workpiece-holding unit
14
, a blade unit
15
, and a driving unit
16
. The table
11
has a first end
111
and a second end
112
. The fixed seat
12
includes a right housing
121
, a partition
122
, and a left housing
123
. The partition
122
is disposed between and is connected removably to the right and left housings
121
,
123
. The coupling rod
13
is disposed fixedly on the table
11
, and has a first end
131
that extends through a bushing
1212
on the right housing
121
of the fixed seat
12
, and a second end
132
. The workpiece-holding unit
14
includes an output shaft
141
that extends through a bearing
1211
on the right housing
121
, a left clamping element
142
that is bolted to the output shaft
141
, a sliding member
143
that is sleeved movably and that is locked releaseably on the second end
132
of the coupling rod
13
, and a right clamping element
144
that is mounted rotatably on the sliding member
143
. The left and right clamping elements
141
,
144
press respectively against two end surfaces
172
,
171
of an elongated wood workpiece
17
so as to clamp the workpiece
17
between the left and right clamping elements
141
,
144
, thereby permitting synchronous rotation of the workpiece
17
and the output shaft
141
. The driving device
16
includes a motor
161
that is disposed between the left housing
123
and the partition
122
, a stepped driving wheel
162
that is sleeved fixedly on a motor shaft of the motor
161
, a stepped driven wheel
163
that is sleeved fixedly on the output shaft
141
, and an endless driving belt
164
that is trained on the driving wheel
162
and the driven wheel
163
. Because all of the elements
161
,
162
,
163
,
164
are disposed within the fixed seat
12
, the latter is bulky in volume, thereby resulting in difficulties during installation, maintenance and repair of the lathe
10
.
SUMMARY OF THE INVENTION
The object of this invention is to provide a wood lathe having both an output shaft and an output shaft-driving source, which are disposed respectively on two compact seats that are fixed respectively on two ends of a table, thereby resulting in convenience during installation, maintenance, and repair of the lathe.
According to this invention, a wood lathe includes first and second seats disposed respectively and fixedly on two ends of a table. A first driving device includes a motor disposed on the second seat, an outer tube fixed between the first and second seats, and a rotating inner rod journalled within the tube and connected to the motor by a belt and pulley unit. An output shaft is journalled on the first seat, and is provided with a fixed first clamping element. A second clamping element is disposed adjacent to the second seat so as to clamp a workpiece between the first and second clamping elements. A second driving device is disposed within the first seat, and interconnects the shaft and the rod to transfer rotation of the rod to the shaft, thereby rotating the workpiece. Because the motor and the shaft are disposed respectively on two different seats, i.e. first and second seats, the volume of each of the first and second seats is relatively compact so that the first and second seats and the first and second driving devices are easy to install, maintain, and repair.
REFERENCES:
patent: 2024460 (1935-12-01), Lewellen et al.
patent: 2096431 (1937-10-01), Keller
patent: 2517608 (1950-08-01), Taylor
patent: 3410326 (1968-11-01), Paquin
patent: 3418863 (1968-12-01), Landau
patent: 3705517 (1972-12-01), Yamanaka et al.
patent: 5186088 (1993-02-01), Wixey
Bishop Steven C.
Knobbe Martens Olson & Bear LLP
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