Separating pulverous or granular material from a carrier medium

Claim 1

AN APPARATUS FOR CLASSIFYING PULVEROUS OR GRANULAR MATERIAL COMPRISING A SUBSTANTIALLY CYLINDRICCAL JACKET HAVING AN INLET AND AN OUTLET AXIALLY SPACED FROM SAID INLET, SAID JACKET DEFINING BETWEEN SAID INLET AND OUTLET A SEPARATING CHAMBER: BEARING MEANS ARRANGED TO SUPPORT SAID JACKET FOR ROTATION ABOUT ITS AXIS: MOTOR MEANS CONNECTED WITH SAID JACKET FOR ROTATING IT: MEANS ARRANGED AT THE INLET END OF THE JACKET FOR SUPPLYING A WHIRLING BODY OF A CARRIER MEDIUM TO SAID SEPARATING CHAMBER SO THAT THE MEDIUM PASSES AXIALLY THROUGH SAID CHAMBER TOWARD THE OUTLET END OF THE JACKET WHILE HAVING A ROTATIONAL MOVEMENT ABOUT THE AXIS OF THE JACKET IN THE SAME DIRECTION