Centrifugal separator

Claim 1

IN A CENTRIFUGAL SEPARATOR FOR SEPARATING A MIXTURE OF DIFFERENT DENSITIES, SAID SEPARATOR INCLUDING A HOLLOW HOUSING, A HOLLOW ROTOR ROTATABLY SUPPORTED IN SAID HOUSING FOR ROTATION ABOUT AN AXIS AND DEFINING A SPACE BETWEEN SAID HOUSING AND SAID ROTOR, SAID HOUSING HAVING AN INLET OPENING FORMED THEREIN FOR THE PASSAGE OF A MIXTURE OF MATERIALS INTO SAID SPACE, SAID ROTOR AND HOUSING HAVING AN OUTLET OPENING EXTENDING THERETHROUGH AT SAID AXIS, SAID ROTOR HAVING A TUBE EXTENDING ALONG THE AXIS OF THE ROTOR AND SPACED SUBSTANTIALLY INWARDLY FROM THE PERIPHERY OF SAID ROTOR, SAID TUBE COMMUNICATING WITH SAID OUTLET OPENING, SAID TUBE HAVING A PLURALITY OF HOLES FORMED THEREIN FOR THE FLOW OF SEPARATED LESS DENSE MATERIAL INTO SAID TUBE, SAID HOUSING INCLUDING A WALL WITH AN OUTLET APERTURE FORMED THEREIN, A SUMP SECURED TO SAID HOUSING AND COMMUNICATING WITH SAID OUTLET APERTURE FOR COLLECTING SEPARATED MORE DENSE MATERIAL; THE IMPROVEMENT WHICH COMPRISES SAID ROTOR INCLUDING A PLURALITY OF VANES EXTENDING INWARDLY AT CIRCUMFERENTIALLY-SPACED POSITIONS AROUND THE ROTOR, SAID ROTOR HAVING SLOTS FORMED THEREIN BETWEEN SAID VANES FOR THE FLOW OF MATERIALS, EACH SAID VANE HAVING ITS SIDES CONVERGING TOWARD THE AXIS OF THE ROTOR SO THAT THE VANE TAPERS INWARDLY AND EACH SLOT IS OF SUBSTANTIALLYUNIFORM WIDTH IN A RADIAL DIRECTION, THE NARROW INNER EDGE OF EACH VANE BEING SPACED FROM SAID TUBE BY A DISTANCE SUFFICIENT TO PROVIDE AN ANNULAR UNOBSTRUCTED SPACE SURROUNDING SAID TUBE; WHEREBY, UPON ROTATION OF SAID ROTOR, SAID VANES ACCELERATE TO ROTATION A MIXTURE OF MATERIALS MATERIALS MIGRATE THROUGH SAID SLOTS, AND THE LESS DENSE MATERIAL COLLECTS IN SAID TUBE AND PASSES OUT SAID OUTLET OPENING.