Dust collector

Claim 1

A DUST SEPARATOR COMPRISING A CONICAL DOWNWARDLY TAPERING LOWER HOUSING SECTION AND ALSO COMPRISING AN UPPER HOUSING SECTION MOUNTED ON SAID LOWER HOUSING SECTION, FUNNEL-SHAPED PASSAGE MEANS EXTENDING FROM SAID UPPER HOUSING SECTION INTO SAID LOWER HOUSING SECTION AND HAVING ITS LOWER END SLIGHTLY SPACED FROM THE ADJACENT WALL PORTION OF SAID LOWER HOUSING SECTION SO AS TO CONFINE THEREWITH A FIRST ANNULAR SLOT-LIKE PASSAGE, INLET PASSAGE MEANS TANGENTIALLY LEADING INTO THE UPPER PORTION OF SAID LOWER HOUSING SECTION FOR INTRODUCING THEREINTO A DUST LADEN FLUID TO BE FREED FROM DUST, SAID FUNNELSHAPED PASSAGE MEANS HAVING THAT END THEREOF WHICH IS REMOTE FROM SAID FIRST ANNULAR SLOT-LIKE PASSAGE PROVIDED WITH A SECOND ANNULAR SLOT-LIKE PASSAGE DISCHARGE MEANS HAVING ONE END IN FLOW COMMUNICATION WITH SAID FUNNELSHAPED PASSAGE MEANS FOR DISCHARGING FLUID FROM WHICH DUST HAS BEEN WITHDRAWN, CHAMBER MEANS SURROUNDING SAID FUNNEL-SHAPED PASSAGE MEANS AND HAVING AN ANNULAR SLOT-SHAPED MOUTH ADJACENT SAID FIRST ANNULAR SLOTLIKE PASSAGE, AND CONDUIT MEANS ESTABLISHING COMMUNICATION BETWEEN SAID SECOND SLOT-LIKE PASSAGE AND SAID CHAMBER MEANS.