Centrifugal machines having a nozzle type rotor structure

Claim 1

IN A CENTRIFUGE ROTOR HAVING A SEPARATING CHAMBER OF DOUBLE CONE-SHAPED CONFIGURATION DEFINED BY A ROTOR BOWL PROVIDED WITH UNDERFLOW DISCHARGE NOZZLES AT THE OUTER PERIPHERY THEREOF LOCATED BETWEEN THE CONSTRICTED ENDS OF THE BOWL, SAID BOWL HAVING A HUB AT ONE CONSTRICTED END AND HAVING PRIMARY OVERFLOW MEANS AT THE OPPOSITE CONSTRICTED END, WITH A ROTOR SHAFT EXTENDING AXIALLY FROM SAID HUB THROUGH THE AREA DEFINED BY SAID PRIMARY OVERFLOW, SAID ROTOR ALSO HAVING MEANS FOR DISCHARGING A SECONDARY OVERFLOW FRACTION FROM THE HUB END PORTION OF THE BOWL, AS WELL AS MEANS FOR RETURNING UNDERFLOW MATERIAL INTO THE SEPARATING CHAMBER AT SAID HUB END PORTION OF THE BOWL, THE ARRANGEMENT WHICH COMPRISES AN INTERNALLY THREADED RIM PORTION LOCATED AT THE HUB END PORTION OF THE ROTOR BOWL; A COMPLEMENTARY RING MEMBER COMPRISING A FRUSTO-CONICAL END PORTION HAVING THE WIDE END THEREOF THREAD-CONNECTED TO SAID THREADED RIM PORTION AND ALSO COMPRISING A CYLINDRICAL END PORTION EXTENDING OUTWARDLY AXIALLY FROM THE NARROW END OF SAID FRUSTO-CONICAL END PORTION AND HAVING AN EXTERNAL THREAD; A HOLLOW ANNULAR INSERT MEMBER SURROUNDED BY SAID COMPLEMENTARY RING MEMBER, COMPRISING A CYLINDRICAL OUTER WALL PORTION PROVIDING A SHOULDER PORTION AND FITTED INTO SAID CYLINDRICAL END PORTION OF THE COMPLEMENTARY RING MEMBER, AN INTERMEDIATE WALL PORTION EXTENDING INWARDLY FROM THE INNER END OF SAID CYLINDRICAL WALL PORTION AND HAVING PREDETERMINED COMMUNICATION OPENINGS, AND AN INNER WALL PORTION EXTENDING FROM THE INNER END OF SAID INTERMEDIATE WALL PORTION AND DIRECTED AWAY FROM SAID HUB; A RING DAM MEMBER SURROUNDING SAID INNER END WALL PORTION OF THE INSERT MEMBER IN CONCENTRICALLY SPACED RELATIONSHIP THEREWITH AND LOCATED ADJACENT TO THE OUTER END OF SAID OUTER WALL PORTION OF THE INSERT MEMBER, AND CONSTITUTING WITH SAID HOLLOW INSERT MEMBER AN ANNULAR DISCHARGE CHAMBER FOR SECONDARY OVERFLOW FROM THE SEPARATING CHAMBER, SAID INNER END WALL PORTION TOGETHER WITH SAID INTERMEDIATE PORTION OF THE INSERT MEMBER AND WITH SAID FRUSTOCONICAL PORTION AND WITH SAID HUB PROVIDING A CENTRAL INFLUENT CHAMBER FOR RECEIVING RETURN UNDERFLOW MATERIAL; AN INTERNALLY THREADED RETAINER RING MEMBER ENGAGING RESPECTIVE EXTERNAL THREAD OF THE COMPLEMENTARY RING MEMBER AND EFFECTIVE WHEN TIGHTENED UPON SAID EXTERNAL THREAD TO ENGAGE SAID RING DAM MEMBER AND TO CAUSE SAID SHOULDER PORTION OF THE INSERT MEMBER TO BE AXIALLY CONFINED BETWEEN SAID RING DAM MEMBER AND SAID COMPLEMENTARY RING MEMBER; A SET OF CONVERGENT TUBULAR MEMBERS ARRANGED AROUND THE ROTOR AXIS IN REGISTRY WITH SAID RESPECTIVE COMMUNICATION OPENINGS, AND DETACHABLY CONNECTED TO SAID INSERT MEMBER AND EXTENDING THROUGH SAID HUB TO PROVIDE COMMUNICATION BETWEEN SAID ANNULAR DISCHARGE CHAMBER AND SAID SEPARATING CHAMBER FOR DISCHARGING AN INTERMEDIATE FRACTION OF SECONDARY OVERFLOW MATERIAL INTO SAID ANNULAR DISCHARGE CHAMBER AND OUT ACROSS SAID RING DAM MEMBER; A SET OF DIVERGENT TUBULAR MEMBERS ARRANGED AROUND THE ROTOR AXIS IN ALTERNATION WITH SAID CONVERGENT TUBULAR MEMBERS AND EXTENDING THROUGH SAID HUB AND PROVIDING COMMUNICATION BETWEEN SAID CENTRAL INFLUENT CHAMBER AND SAID SEPARATING CHAMBER FOR THE RETURN OF UNDERFLOW MATERIAL FROM SAID CENTRAL INFLUENT CHAMBER INTO THE REGION OF THE NOZZLES IN THE SEPARATING CHAMBER, AND PUMPING VANES PROVIDED IN SAID CENTRAL INFLUENT CHAMBER AND EFFECTIVE TO IMPEL RETURN UNDERFLOW MATERIAL INTO AND THROUGH SAID DIVERGENT TUBULAR MEMBERS FOR DELIVERY IN SAID SEPARATING CHAMBER.