Reverse bearing bit

Claim 1

A ROTARY DRILL BIT WHICH COMPRISES: (A) A BODY MEMBER PROVIDED WITH MEANS NEAR THE UPPER END THEREOF FOR CONNECTING SAID MEMBER TO THE LOWER END OF A DRILL STRING AND WITH AN INTERNAL PASSAGEWAY EXTENDING FROM AN INLET IN THE UPPER END OF SAID MEMBER TO AN OUTLET IN THE LOWER SURFACE OF SAID MEMBER; (B) A LEG DEPENDING FROM SAID BODY MEMBER, SAID LEG INCLUDING A CANTILEVER PIN EXTENDING INWARDLY AND DOWNWARDLY BENEATH SAID BODY MEMBER AND SAID PIN CONTAINING AN AXIAL RECESS EXTENDING INWARDLY IN SAID PIN FROM AN OPENING IN THE FREE END THEREOF; (C) A CONICAL CUTTING ELEMENT PROVIDED WITH AN AXLE EXTENDING FROM THE BASE THEREOF AND AN ANNULAR RECESS SURROUNDING SAID AXLE, SAID AXLE EXTENDING INTO SAID AXIAL RECESS IN SAID PIN; (D) A THRUST BEARING POSITIONED WITHIN SAID AXIAL RECESS BETWEEN THE END OF SAID RECESS AND THE END OF SAID AXLE; (E) A SLEEVE BEARING POSITIONED WITHIN SIAD AXIAL RECESS BETWEEN THE WALL OF SAID RECESS AND SAID AXLE, SAID SLEEVE BEARING SEATING AGAINST A SHOULDER IN SAID AXIAL RECESS NEAR THE END THEREOF; (F) A PLURALITY OF BALLS POSITIONED WITHIN SAID AXIAL RECESS BETWEEN AN INNER RACE ON THE SURFACE OF SAID AXLE AND AN OUTER RACE ON THE WALL OF SAID AXIAL RECESS AT AN INTERMEDIATE POINT THEREIN, SAID BALLS AND RACES LIMITING AXIAL MOVEMENT OF SAID CUTTING ELEMENT WITH RESPECT TO THE LEG OF SAID BIT; AND (G) A PLURALITY OF ROLLER BEARINGS POSITIONED WITHIN SAID AXIAL RECESS BETWEEN AN INNER RACE ON THE SURFACE OF SAID AXLE AND AN OUTER RACE ON THE WALL OF SAID AXIAL RECESS AT A POINT NEAR THE OUTER END OF SAID AXIAL RECESS.