Abstract: A powered air cleaning system (31) and air cleaning method are disclosed. The system comprises a flow path (22) extending through the system from an air inlet (4) to a clean air outlet (5). A motor-driven fan (24) located along the flow path draws particulate debris laden air into the inlet and rotates it about an axis (A-A) 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 (33) is provided for ejecting particulate debris laden air from the stratified rotating flow in the system to the environment. An air filter (9) located within the rotating flow and across the flow path upstream of the outlet filters air from the innermost orbits of the stratified rotating flow.

Abstract: A powered air cleaning system (1) and air cleaning method are disclosed. The system has a flow path (22) extending through the system from an air inlet (4) to a clean air outlet (5). A motor-driven fan (24) located along the flow path draws particulate debris laden air into the inlet and rotates it about an axis (A—A) 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 (25) is provided for ejecting particulate debris laden air from the stratified rotating flow in the system to the environment. An air filter (9) located within the rotating flow and across the flow path upstream of the outlet filters air from the innermost orbits of the stratified rotating flow.

Abstract: A powered air cleaning system (31) and air cleaning method are disclosed. The system comprises a flow path (22) extending through the system from an air inlet (4) to a clean air outlet (5). A motor-driven fan (24) located along the flow path draws particulate debris laden air into the inlet and rotates it about an axis (A-A) 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 (33) is provided for ejecting particulate debris laden air from the stratified rotating flow in the system to the environment. An air filter (9) located within the rotating flow and across the flow path upstream of the outlet filters air from the innermost orbits of the stratified rotating flow.

Abstract: An air cleaner for centrifugally ejecting heavier-than-air particulate debris from an air stream. A housing encloses a fan for drawing debris-laden air into a forward portion of the housing and rotating the air so as to form a rotating flow pattern that stratifies the debris-laden air, with the heavier particles of debris in the outermost orbits of the rotating flow pattern. The thus rotating air passes through an annulus to a rear portion of the housing in which the air flow is caused to back up. As a consequence, some solid debris in the forward housing portion moves into a forward isolation region from which that debris is ejected through a forward exit orifice. Other solid debris in the rear housing portion enters a rear isolation region from which it is ejected through a rear exit orifice. The thus-cleaned air passes through an exit gap to an air outlet from which it exits the air cleaner for use.

Abstract: An air cleaner for centrifugally ejecting heavier-than-air particulate debris from an air stream. A housing encloses a fan for drawing debris-laden air into a forward portion of the housing and rotating the air so as to form a rotating flow pattern that stratifies the debris-laden air, with the heavier particles of debris in the outermost orbits of the rotating flow pattern. The thus rotating air passes through an annulus to a rear portion of the housing in which the air flow is caused to back up. As a consequence, some solid debris in the forward housing portion moves into a forward isolation region from which that debris is ejected through a forward exit orifice. Other solid debris in the rear housing portion enters a rear isolation region from which it is ejected through a rear exit orifice. The thus-cleaned air passes through an exit gap to an air outlet from which it exits the air cleaner for use.

Abstract: A powered low restriction air precleaner device and method for centrifugally ejecting heavier-than-air particulate debris from debris laden air for providing for a combustion engine air intake, an engine air cooling system, or a cab air intake system, for example. The device employs a fan located in the device for drawing debris laden air into the air precleaner device. The debris laden air is spun in the air precleaner device to form a rotating flow pattern that stratifies the debris laden air with the most massive particles of debris in the outermost orbits of the rotating flow pattern of debris laden air. Debris from the rotating flow pattern is ejected from the device for cleaning the air, which is flowed to an air outlet of the device for supplying the cleaned air.

Abstract: An air precleaner and method for centrifugally ejecting heavier-than-air particulate debris from an air stream utilizes a circular separator chamber formed with a toroidal dome for smooth airflow transition of the vortex airflow moving through the separator chamber in a cyclonic pattern upwardly from an inlet in a base of the precleaner past a debris ejection duct where it is folded over by the toroidal dome for whirlpooling down to an outlet in the base radially inwardly of and through the upwardly moving vortex airflow. The area for the airflow in the separator chamber progressively decreases linearly to increase the speed of the airflow in the chamber. A particle accelerator assembly includes a plurality of appendages that arc back from a central hub in a swept-back attitude relative to a direction of the vortex airflow.