Combined flexible seal and agitator for pumps

Claim 1

A HELICAL GEAR PUMP COMPRISING: A TUBULAR HOUSING HAVING AN INLET OPENING INTO A STUFFING BOX; AN ELONGATED SCREW FEED PASSAGEWAY EXTENDING AXIALLY FROM SAID STUFFING BOX TO AN OUTLET ORIFICE; AN ECCENTRICALLY ROTATABLE, HELICALLY TWISTED ROTOR MOUNTED IN SAID SCREW FEED PASSAGEWAY WITH ONE END EXTENDING PARTLY INTO SAID STUFFING BOX; A ROTATABLE DRIVE SHAFT AXIALLY MOUNTED ON THE OPPOSITE SIDE OF SAID STUFFING BOX FROM SAID ROTOR, SAID DRIVE SHAFT HAVING AN EXTENDED HOLLOW SLEEVE END PORTION PROTRUDING PARTLY INTO SAID STUFFING BOX WHICH IS AXIALLY SPACED FROM AND DOES NOT BEAR AGAINST ANY PART OF SAID ROTOR IN SAID STUFFING BOX; A ROTOR GREASE RESERVOIR RECESSED WITHIN THE END OF THE ROTOR WHICH EXTENDS INTO SAID STUFFING BOX; A DRIVE SHAFT GREASE RESERVOIR RECESSED WITHIN THE SLEEVE END PORTION OF SAID DRIVE SHAFT; AN ELONGATED CONNECTING ROD SECURED BETWEEN SAID ROTOR AND SAID DRIVE SHAFT WHICH IS SMALLER IN DIAMETER THAN THE INTERIOR OF SAID EXTENDED SLEEVE THEREOF, SAID CONNECTING ROD FORMED WITH A ROUNDED UNIVERSALLY MOVABLE, ROTOR END JOINT SEALINGLY MOUNTED WITHIN SAID ROTOR GREASE RESERVOIR AND, ON THE OPPOSITE END, A ROUNDED, UNIVERSALLY MOVABLE, DRIVE SHAFT END JOINT SEALINGLY MOUNTED WITHIN SAID DRIVE SHAFT RESERVOIR; AND A FLEXIBLE ANNULAR COLLAR ATTACHED BETWEEN THE END OF SAID ROTOR AND SAID DRIVE SHAFT WITHIN SAID STUFFING BOX, SAID COLLAR COMPLETELY ENCLOSING THE SPACE BETWEEN SAID ROTOR AND SAID DRIVE SHAFT AND SEALING THE INTERIOR THEREOF FROM EXPOSURE TO SUBSTANCES IN SAID STUFFING BOX BUT BEING SUFFICIENTLY FLEXIBLE TO ALLOW ECCENTRIC ROTATION IN SAID STUFFING BOX OF SAID ROTOR END RELATIVE TO AXIAL ROTATION OF SAID DRIVE SHAFT.