Cutting – Means to drive or to guide tool – Bevel or miter cut
Reexamination Certificate
2000-02-07
2001-08-14
Ashley, Boyer (Department: 3724)
Cutting
Means to drive or to guide tool
Bevel or miter cut
C083S168000, C083S169000, C083S171000, C083S435110, C083S473000, C083S477100, C083S477200, C083S699510, C125S013030
Reexamination Certificate
active
06272961
ABSTRACT:
BACKGROUND OF THE PRESENT INVENTION
1. Field of Invention
The present invention relates to cutting machine, and more particularly to a cutting machine with built-in miter cutting feature which is adjusted accommodate cutting work in at an angle or a bevel for precision cutting on materials such as ceramic tile, marble, and the like.
2. Description of Related Arts
Referring to
FIG. 1
of the drawing, a conventional cutting machine as illustrated is commonly used in the construction industry for shaping and cutting materials such as ceramic tile, marble, cranite, and natural stone. The conventional cutting machine comprises a cutting table
11
supported on a table frame
12
, with legs
171
and a cutting head
13
overhanging the cutting table
11
with a circular 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
.
Conventionally, the saw blade
14
is rigidly installed perpendicularly to the cutting table
11
so that when a work piece is placed horizontally to the cutting table
11
for cutting or shaping, the work piece will be cut and has a right angled cutting edge. If a user wants to have a bevel cut on the work piece, the user must inclinedly support the work piece to adjust a slanted angle with respect to the saw blade
14
by himself.
Some cutting machines provide a 30° to 45° miter block to inclinedly support the work piece so that the vertical saw blade can be positioned to the work piece at a slanted angle in order to provide a bevel cut on the work piece. However, the angle of the work piece to be lifted up is limited by the size of miter block. Sometime, when the miter block fails to correctly place in position, an uneven bevel cut may happen or a permanent damage may be caused to the work piece. In general, the work piece to be cut for installation needs to be placed up side down for proper angle cutting, that may cause chipping at the work piece's cutting edge.
SUMMARY OF THE PRESENT INVENTION
A main object of the present invention is to provide a cutting machine with built-in miter cutting feature that accommodates cutting work in at an angle or a bevel for precision cutting on a work piece.
Another object of the present invention is to provide a cutting machine with built-in miter cutting feature wherein the cutting head can be adjustably rotated up to 45° with respect to the horizontal work piece surface for providing a bevel cut on the work piece.
Another object of the present invention is to provide a cutting machine with built-in miter cutting feature, wherein the miter cutting arrangement comprises a locker device for locking the cutting head at either a normal position or a slanted position.
Another object of the present invention is to provide a cutting machine with built-in miter cutting feature, wherein the inclination of the cutting head, i.e. the inclination of the cutting blade, can be adjusted by operating the miter cutting arrangement.
Another object of the present invention is to provide a cutting machine with built-in miter cutting feature, wherein the miter cutting arrangement, wherein the platform level of the cutting head can also be adjusted.
Accordingly, in order to accomplish the above objects, the present invention provides a cutting machine with built-in miter cutting feature, which comprises:
a table frame;
a cutting table slidably mounted on the table frame;
a coolant tray which is supported in the table frame and is disposed beneath the cutting table; and
a cutting head comprising a motor, a saw blade, and a transmission means for transmitting a rotating power of the motor to drive the saw blade to rotate;
a cutting head support bracket affixed at one side of the table frame for supporting the cutting head above the cutting table;
a miter cutting arrangement, which is provided between the cutting head support bracket and the cutting head, comprising:
a platform support frame which comprises a platform support arm, a mounting mean for longitudinally mounting the platform support arm to the cutting head support bracket so as to support the platform support arm longitudinally extending above of the table frame, and a platform pivot arm having an inner end affixed to the platform support arm and an outer end laterally extended from the platform support arm;
a head platform wherein the motor is firmly mounted thereon and the saw blade is rotatably supported at an outer side thereof;
a pivot means for pivotally connecting the outer side of the head platform with the platform pivot arm in a perpendicular manner that the cutting head is able to be rotated about the outer side of the head platform to a slanted position by lifting an inner side of the head platform up from the platform support frame;
a supporting means for supporting the inner side of the head platform with the platform support arm, so that, during a normal position, the outer side and the inner side of the head platform are respectively supported by the platform pivot arm and the platform support arm; and
a locker device for selectively locking the cutting head at the normal position and the slanted position.
REFERENCES:
patent: 3672251 (1972-06-01), Jagers
patent: 3807095 (1974-04-01), Harding et al.
patent: 4002094 (1977-01-01), Erickson et al.
patent: 4428159 (1984-01-01), Sigetich et al.
patent: 4991354 (1991-02-01), Schweickhardt
patent: 5676124 (1997-10-01), Lee
patent: 5746193 (1998-05-01), Swan
patent: 5947103 (1999-09-01), Saccon
Ashley Boyer
Chan Raymond Y.
David and Raymond Patent Group
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