Patent ID: 7056368
Filing Date: 2006-06-06
Classification: B01D,F02M

Abstract:
1. A powered air cleaning system comprising: a flow path extending through the system from an inlet to an outlet; a 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; an ejector port for ejecting particulate debris laden air from the stratified rotating flow in the system to the environment; and an air filter located within the rotating flow and across the flow path upstream of the ejector port and the outlet for filtering air from the innermost orbits of the stratified rotating flow, the air filter being elongated in the direction of said axis so that the rotating flow about the filter causes a self cleaning action on the filter.