Air cleaner

Claim 1

AN AIR CLEANER STRUCTURE COMPRISING A COMBINATION OF AN AIR INLET TUBE FEEDING THE TOP REGION OF A CYLINDRICAL SIDE WALL, SAID SIDE WALL BEING FITTED ON ITS BOTTOM WITH A REMOVABLE CUP-SHAPED DUST RECEPTACLE AND ON ITS TOP WITH AN AXIAL OUTLET TUBE, SAID SIDE WALL CONTAINING A REPLACEABLE ANNULAR GAS PERVIOUS FILTER WALL CONTAINING RADIALLY SPACED INNER AND OUTER WALL SURFACES, THE OUTER WALL SURFACE BEING INWARDLY SPACED FROM SAID CYLINDRICAL SIDE WALL TO DEFINE AN ANNULAR INTAKE PASSAGE, SAID AIR CLEANER STRUCTURE HAVING A DISK-LIKE PARTITION WALL COVERING THE INNER END OF SAID DUST RECEPTACLE, SAID PARTITION WALL HAVING A RESTRICTED OPENING BETWEEN SAID ANNULAR INTAKE PASSAGE AND SAID DUST RECEPTACLE, SAID AIR CLEANER STRUCTURE FURTHER HAVING A FIRST ANNULAR BAFFLE LOCATED ABOUT BUT SPACED FROM AN UPPER PORTION OF SAID OUTER FILTER WALL SURFACE AND HAVING A PLURALITY OF RADIALLY OUTWARDLY PROJECTING AIR DEFLECTING BLADES ATTACHED TO THE PERIPHERY THEREOF, ADAPTED TO PRODUCE WHIRLING MOTION TO INCOMING UNFILTERED AIR PASSING THERETHROUGH, AND HAVING FURTHER A SECOND ANNULAR BAFFLE SPACED FROM AND CLOSELY SURROUNDING THE END PORTION OF SAID OUTER FILTER WALL SURFACE ADJACENT SAID DUST RECEPTACLE WHICH PROJECTS AXIALLY UPWARDLY FROM SAID PARTITION WALL AND WHICH IS SO ASSOCIATED WITH SAID FILTER AND SAID PARTITION WALL THAT DUST CAN FREELY PASS FROM THE END REGION OF SAID ANNULAR INTAKE PASSAGE THROUGH SAID RESTRICTED OPENING AND INTO SAID DUST RECEPTACLE THEREBY TENDING TO PREVENT DEPOSITION OF DUST PARTICLES ON THE END REGIONS OF SAID OUTER FILTER WALL SURFACE.