Improvement in centrifuges

Claim 1

THE COMBINATION WITH A CENTRIGUE HAVING A ROTOR FOR THE SEPARATION OF SOLIDS FROM LIQUID, SAID ROTOR HAVING ZONES FOR THE DISCHARGE OF SOLIDS AND LIQUID, MEANS FOR IMPELLING SEPARATED SOLIDS TO THE ZONE OF DISCHARGE OF SOLIDS, SAID LAST-MENTIONED MEANS COMPRISING AN IMPELLER FOR MOVING SAID SOLIDS RELATIVE TO SAID ROTOR, AND MEANS FOR ROTATING SAID ROTOR AND FOR ACTUATING SAID IMPELLER, OF A FLEXIBLE SLEEVE OF THIN, NON-STRETCHABLE, WEAR-RESISTANT MATERIAL, THE SLEEVE BEING RECEIVED INTO SAID ROTOR IN SLIDING FIT AND BEING CIRCULAR IN CROSS-SECTION IN CONTACT WITH A CORRESPONDING AREA CIRCULAR IN CROSS-SECTION ON THE INNER PERIPHERY OF SAID ROTOR, THE INNER SURFACE OF SAID SLEEVE BEING CLOSE TO SAID IMPELLER, SAID SLEEVE HAVING A SLIT THEREIN EXTENDING FROM ONE END THEREOF TO THE OTHER SO AS TO EXPAND UNDER CENTRIFUGAL FORCE UPON ROTATION OF SAID ROTOR TO GRIP THE INNER PERIPHERY OF SAID ROTOR, THEREBY PREVENTING RELATIVE MOVEMENT BETWEEN SAID SLEEVE AND SAID ROTOR UPON RELATIVE MOVEMENT OF SAID IMPELLER WITH RESPECT TO SAID SLEEVE IN MOVING SOLIDS DEPOSITED BY CENTRIFUGAL FORCE ON THE INNER SURFACE OF SAID SLEEVE TOWARD THE ZONE OF DISCHARGE OF SOLIDS, AND A PLURALITY OF CIRCUMFERENTIALLY SPACED RIBS SECURED TO THE INNER SURFACE OF SAD SLEEVE, ONE OF SAID RIBS BEING ATTACHED TO ONE EDGE OF SAID SLIT, SAID RIB OVERLAPPING SAID SLIT IN SAID SLEEVE.