Patent ID: 7716781

Claim:
A suction device for use in a cleaning apparatus that moves air, the device comprising: a. a casing defining a substantially cylindrical cavity, the casing having first and second opposing ends and a first axis, the first end having an intake, and the second end having an exhaust, b. a DC brushless motor contained within the cavity, the motor having a stator mounted to a shaft and the motor having a substantially cylindrical rotor mounted for rotation about the shaft, the shaft having a second axis and the shaft being mounted within the casing so as to be non-rotatable with respect to the casing with the first and second axes aligned, and c. an impeller mounted to the rotor so as to rotate with the rotor, wherein rotation of the impeller in a first direction causes air to be drawn through the intake and expelled through the exhaust, wherein the impeller is mounted about a reduced diameter portion of the rotor.