Stone working – Splitting – shearing – and punching – Roller-type cutter
Reexamination Certificate
1999-10-07
2002-08-06
Banks, Derris H. (Department: 3723)
Stone working
Splitting, shearing, and punching
Roller-type cutter
C125S035000, C125S013010, C451S340000, C451S393000
Reexamination Certificate
active
06427677
ABSTRACT:
FIELD OF THE INVENTION
This invention relates generally to tile or masonry saws and, more particularly, to tile saws with expanded capacity.
BACKGROUND OF THE INVENTION
A typical tile saw includes a base which supports a generally flat table top. A saw unit may be disposed on the base or table for cutting a workpiece, such as a tile or masonry brick, disposed on the table. However, the maximum cutting capacity of such tile saws is limited by the size of the machine, i.e., the envelope.
Accordingly, persons skilled in the art have devised a tile saw where the base has two tracks and the table has bearings or wheels riding on the tracks, so that the table can be slid relative to the saw unit for increased capacity. Such tile saws, however, are usually susceptible to dust collecting between the tracks and wheels, which creates binding between the base and the table. Ultimately, the binding may cause uneven, inaccurate cuts, which may translate into loss of time, materials and/or profit for the user.
Further, the capacity of such tile saws is usually limited to the length of the tracks. In other words, if a user wants increased capacity, he may have to lengthen the tracks. However, longer tracks may result in less portability of the tile saw.
It is therefore an object of this invention to provide a saw with increased cutting capacity without sacrificing portability.
SUMMARY OF THE INVENTION
In accordance with the present invention, an improved tile saw is employed. The saw comprises a base, a table disposed on the base, a saw unit disposed on the base, a first stationary rail having a first length extending generally along a first direction, the first stationary rail being connected to one of the table and saw unit, and a first movable rail engaging the first stationary rail and extending generally parallel to the first stationary rail, the first movable rail being connected to the other of the table and saw unit, wherein the first movable rail is movable with respect to the first stationary rail such that the other of the table and saw unit is movable generally along the first direction over a range which exceeds the first length. Preferably, the first movable rail is slidingly received over the first stationary rail.
Additional features and benefits of the present invention are described, and will be apparent from, the accompanying drawings and the detailed description below.
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Hardebeck Jason D.
O'Banion Michael L.
Puzio Daniel
Ayala Adan
Banks Derris H.
Black & Decker Inc.
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