| 主权项 |
1. A pneumatic rotary tool, comprising:
a housing having an inlet passage extending from an inlet operatively connectable to an air source for providing air to power the tool, said inlet passage extending to an upstream end of a motor cylinder that is inside the housing, the housing having an outlet passage extending from a downstream end of the motor cylinder to an outlet; a rotor rotatably mounted in the motor cylinder for rotation relative to the cylinder under pneumatic power; a valve positioned along the inlet passage operable to selectively permit air to pass through the inlet passage to the motor cylinder for rotating the rotor relative to the cylinder, air flowing through the motor cylinder as the rotor rotates and through the outlet passage to the outlet; a cutter head operatively connected to the rotor for rotation relative to the housing in response to rotation of the rotor, said cutter head comprising a clamp for selectively holding a cutter so the cutter moves to cut material as the cutter head rotates relative to the housing, said cutter head being positioned in the outlet so air passing through the outlet passes over the head to blow material away from the cutter head as the cutter cuts the material; and wherein the downstream end of the cylinder has an outer perimeter including a plurality of areas that are spaced from an inner wall of the housing so each area forms with the wall a respective air passage that is in fluid communication with the outlet. |
