Stone working – Sawing – Rotary
Reexamination Certificate
1999-01-12
2001-09-04
Eley, Timothy V. (Department: 3723)
Stone working
Sawing
Rotary
C125S013030, C083S372000
Reexamination Certificate
active
06283110
ABSTRACT:
FIELD OF THE PRESENT INVENTION
The present to invention relates to a ceramic and masonry saw, and more particularly to a cutting saw machine having its motor installed in the cutting table instead of mounting on the cutting head so as to reduce the overall size and weight of the machine for easy operation, carry and storage.
BACKGROUND OF THE PRESENT INVENTION
Referring to
FIG. 1
, a conventional cutting saw machine as illustrated is commonly used in the construction industry for shaping and cutting masonry tiles and the like, made from materials such as granite, marble, slate, ceramics, paver, and brick. The traditional cutting saw machine
10
as shown in
FIG. 1
includes a cutting table
11
supported on a floor standing frame
12
, a cutting head
13
overhanging the cutting table
11
with a circular diamond saw blade
14
which is powered by an electric motor
15
. The electric motor
15
is directly mounted on the cutting head
13
for driving the saw blade
14
to rotate through a transmission means
16
.
Besides, liquid coolant that is circulated by pump is usually used to cool the saw blade
14
and work piece and to flush away sawdust. Although such conventional cutting saw machine substantially provides desirable features that include achieving precise and accurate cuts, ease of replacement of the blade when it is worn, rapid adjusting of the saw blade to various positions to permit complex cuts, ease of emptying the tray positioned underneath the saw blade, and etc., the conventional cutting saw still contains the following shortcomings.
1. The motor
15
is positioned above the cutting table
11
and the cutting head
13
supports the heavy weight of the motor
15
. Therefore, the cutting head
13
must be made of strong material such as cast iron or steel alloy to rigidly support the heavy motor
15
. The motor supporting cutting head
13
is heavy in weight that also increases the weight of the cutting saw machine.
2. The conventional cutting saw machine
10
as shown in
FIG. 1
is more difficult to transport and operate due to the fact that the major portion of the weight of the whole cutting saw machine
10
is its upper part, including the motor
15
, the cutting head
13
, and the cutting table
11
. In other words, the conventional cutting saw machine
10
has an unstable structure, i.e. a heavier upper head and a lighter lower support base, that may easily lose balance.
3. The user must be very carefully to prevent any body contact with the hot motor
15
exposed above the cutting table
11
to avoid unwanted body injury when the motor
15
is functioning during operation of the cutting saw machine.
SUMMARY OF THE PRESENT INVENTION
The main object of the present invention is to provide a cutting saw machine that has a motor installed in a table frame which is used for supporting the cutting table and the coolant tray, so that the cutting head thereof can be made of light material to reduce the overall weight of the machine.
Another object of the present invention is to provide a cutting saw machine that has a more stable structure that is more easily to transport and operate, because the major weight of the machine is distributed in the table frame where receives the motor and the coolant tray.
Another object of the present invention is to provide a cutting saw machine wherein the motor is positioned below the coolant tray that can prevent direct contact with the user, and that the coolant tray also provides a cool surrounding to the motor that can help the motor to reduce its heat when it is functioning.
Another object of the present invention is to provide a cutting saw machine, which contains an additional supporting, means to rotatably support the saw blade above the cutting table thereof.
Accordingly, in order to accomplish the foregoing objects, the present invention provides a cutting saw machine comprising:
a table frame;
a cutting table attached on the table frame;
a supporting frame, which is attached to the table frame, having a transmission chamber;
a cutting head having a proximal end and a distal end, wherein the cutting head is supported above of the cutting table by attaching the proximal end to the supporting frame;
a bearing housing assembly, which is disposed in the cutting head, having an output end and an input end which is extended to an upper position inside the transmission chamber of the supporting frame;
a circular saw blade positioned at the distal end of the cutting head and connected to the output end of the bearing housing assembly;
a motor mounted in the table frame having a driving shaft extended to a lower position inside the transmission chamber of the supporting frame;
a transmitting means disposed in the transmission chamber of the supporting frame for transmitting power outputting from the motor to the input end of the bearing housing assembly so as to drive the saw blade to rotate above the cutting table; and
a coolant tray which is supported in the table frame and is disposed beneath the cutting table and above the motor.
Moreover, the coolant tray also forms a motor cavity indented thereunder for receiving the motor therein so as to reduce the size of the cutting saw machine and to provide cooling effect around the motor that also generates heat when functioning.
REFERENCES:
patent: 2455113 (1948-11-01), Coates
patent: 3635206 (1972-01-01), Harclerode
patent: 5127391 (1992-07-01), O'Keefe
patent: 6000387 (1999-12-01), Lee
patent: 6080041 (2000-06-01), Greenland
Chan Raymond Y.
David and Raymond Patent Group
Eley Timothy V.
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