Patent ID: 8216330

Claim:
A powered air cleaning system comprising: a flow path extending through the system from an inlet to an outlet, an motor-driven fan located along the flow path to draw particulate debris laden air into the inlet and rotate it about an axis to form a rotating flow that stratifies the debris laden air with the heaviest particles in the outermost orbits of the rotating flow, a separator-ejector chamber in the flow path downstream of the motor-driven fan, the outermost orbits of the rotating flow riding on an outer wall of the separator-ejector chamber, the separator-ejector chamber having an ejector port for ejecting particulate debris laden air from the stratified rotating flow, at least one de-swirl blade located within the rotating flow in the chamber for redirecting clean air from the innermost orbits of the stratified rotating flow along the flow path centrally through an axial end of the chamber to the outlet.