Back to results
US 10,882,123 B2Granted
Miter saw
AssigneeMilwaukee Electric Tool Corporation
InventorsMike Brewster, Taylor Crabb, Josh Adams, Steven Cunningham, David Rose, Daryl S. Richards, Jeffrey S. Holly, John W. Thiele
Life of this patent
Estimating the term…
Abstract
A miter saw includes a base assembly and a saw unit pivotably coupled to the base assembly. The saw unit includes a saw arm, a brushless motor supported by the saw arm, and power electronics positioned outside the motor for supplying power to the motor. The power electronics are coupled to a structural component of the miter saw to utilize the entire mass of the structural component as a heat sink to dissipate heat generated by the power electronics.
Claims15
A miter saw comprising:
- a base assembly including
- a base,
- a turntable pivotably coupled to the base about a vertical miter axis, and
- a bevel arm pivotably coupled to the turntable about a horizontal bevel axis;
- and
- a saw unit including
- a saw arm pivotably coupled to the bevel arm about a chop axis,
- a brushless motor supported by the saw arm,
- a plate coupled to the saw arm,
- a circuit board electrically coupled to the brushless motor, the circuit board positioned relative to the plate as to be encapsulated by a potting material on the plate;
- a bracket directly attached to the saw arm, the bracket having a length transverse to the chop axis of the saw arm, the bracket spaced from and oriented perpendicular to the circuit board, and
- field-effect transistors for supplying power to the motor, the field-effect transistors electrically coupled to the circuit board, the field-effect transistors directly attached to the bracket at a location away from the motor and the circuit board to utilize the saw arm as a heat sink to dissipate heat generated by the field-effect transistors.
9 more elements
Dependencies are inferred from the claim text.