US Patent 7789003 Miter saw

A saw having a table assembly, a pivot arm, a saw blade and a dust collection system. The table assembly includes a workpiece support surface upon which a workpiece can be supported. The pivot arm is pivotally mounted to the table assembly, and includes a driver and a dust collection passage. The saw blade is mounted on the pivot arm and is driven by the driver for cutting the workpiece. The dust collection system includes a groove having one end which connects to the table assembly, and another end extending to the dust collection passage. Sawdust and/or chips generated during the cutting operation are transferred to the dust collection passage along the groove and are discharged out of the saw.