Centrifugal air separator for removal of particles

Claim 1

A CENTRIFUGAL SEPARATING MACHINE FOR REMOVING PARTICLES FROM A PARTICLE-LADEN GASEOUS STREAM COMPRISING, A SEPARATING CHAMBER THROUGH WHICH THE MOVING GASEOUS STREAM IS PASSED, A ROTOR OF HOLLOW, SYMMETRICAL CONSTRUCTION MOUNTED WITHIN SAID CHAMBER IN SPACED RELATION TO THE WALLS THEREOF TO PROVIDE AN ANNULARLY ARRANGED PARTICLE-COLLECTING CHAMBER, MEANS FOR DRIVING SAID ROTOR AT HIGH SPEED ON ITS LONGITUDINAL AXIS, SAID ROTOR HAVING AN IMPERFORATE END PORTION, SAID CHAMBER HAVING A GASEOUS STREAM INLET AT ONE END THEREOF ADJACENT THE SAID IMPERFORATE END PORTION AND ARRANGED TO DIRECT THE INCOMING FLOW OF SAID GAS STREAM AGAINST SAID IMPERFORATE END PORTION WHEREBY THE INCOMING FLOW OF SAID GASEOUS STREAM WILL BE DEFLECTED RADIALLY OUTWARD ABOUT THE PERIPHERY OF SAID ROTOR, SAID ROTOR HAVING A DENSELY FORAMINATED PERIPHERAL WALL OF CIRCULAR CROSS SECTION DEFINING INTERIORLY AN UNOBSTRUCTED PASSAGE FOR SUBSTANTIALLY THE FULL LENGTH OF SAID ROTOR TO PERMIT SIMULTANEOUS RADIAL AND AXIAL MOVEMENT OF THE GASEOUS STREAM THROUGH THE ROTOR, AND WITH THE FORAMINATIONS OF SUCH SIZE AS TO FREELY PERMIT PASSING OF PARTICLES RADIALLY IN EITHER DIRECTION THERETHROUGH DURING ROTOR REVOLUTION, A "CLEAN" GAS WITHDRAWAL TUBE OF SUBSTANTIALLY SMALLER DIAMETER THAN SAID ROTOR CONNECTED AT ITS OUTER END WITH A SOURCE OF PARTIAL VACUUM AND HAVING AN INNER OPEN END EXTENDING AXIALLY WITHIN THE INTERIOR OF SAID ROTOR THROUGH ONE END THEREOF SO THAT UPON ROTATION OF THE ROTOR THE PASSAGE OF THE STREAM WITHIN THE ROTOR TO THE "CLEAN" GAS WITHDRAWAL TUBE IS ALONG AN UNOBSTRUCTED SPIRAL VORTER-LIKE PATH DECREASING IN DIAMETER FROM ONE END OF SAID ROTOR TO THE SAID WITHDRAWAL TUBE, SAID EXTENDED INNER END OF SAID TUBE FUNCTIONING TO CONCENTRATE THE APEX OF SAID VORTEX-LIKE PATH AT A LOCATION INWARDLY FROM SAID ONE END OF THE ROTOR WHEREBY THE ANGULAR VELOCITY OF THE STREAM WHILE TRAVELING IN SAID SPIRAL VORTEX-LIKE PATH INCREASES WITH THE DECREASE IN DIAMETER OF THE PATH TO SUBJECT THE REMAINING PARTICLES CARRIED BY THE STREAM TO AN INCREASING CENTRIFUGAL FORCE THEREBY SEPARATING THE PARTICLES FROM THE GAS AND DIRECTING THE PARTICLES RADIALLY THROUGH SAID FORAMINATIONS TO THE SPACE PERIPHERALLY OF THE ROTOR FOR DISCHARGE.