Swivel coupling with split thrust ring

Claim 1

A SWIVEL PIPE FITTING, COMPRISING AN OUTER TUBULAR MEMBER, AN INNER TUBULAR MEMBER ROTATABLY RECEIVED WITHIN SAID OUTER TUBULAR MEMBER, SAID OUTER TUBULAR MEMBER HAVING A STEPPED BORE HAVING A FIRST RELATIVELY LARGE PORTION, A SECOND PORTION OF INTERMEDIATE SIZE, AND A THIRD PORTION OF RELATIVELY SMALL SIZE, SAID INNER TUBULAR MEMBER HAVING A FIRST CYLINDRICAL PORTION AND A REDUCED CYLINDRICAL END PORTION, A SEALING RING DISPOSED AROUND SAID REDUCED END PORTION OF SAID INNER MEMBER AND RECEIVED WITHIN SAID SECOND INTERMEDIATE PORTION OF SAID STEPPED BORE, SAID REDUCED END PORTION OF SAID INNER MEMBER EXTENDING SLIDABLY INTO AND BEING ROTATABLY RECEIVED WITHIN SAID THIRD RELATIVELY SMALL PORTION OF SAID STEPPED BORE, SAID FIRST CYLINDRICAL PORTION OF SAID INNER MEMBER EXTENDING SLIDABLY INTO AND BEING ROTATABLY RECEIVED WITHIN SAID SECOND INTERMEDIATE PORTION OF SAID STEPPED BORE, SAID OUTER MEMBER HAVING AN ANNULAR RADIAL WALL EXTENDING BETWEEN SAID FIRST AND SECOND PORTIONS OF SAID STEPPED BORE, SAID FIRST CYLINDRICAL PORTION OF SAID INNER MEMBER HAVING AN EXTERNAL ANNULAR GROOVE THEREIN, A SPLIT GENERALLY DISK-SHAPED RING RECEIVED IN SAID GROOVE AND ENGAGING SAID RADIAL WALL OF SAID FIRST MEMBER, SAID SPLIT RING BEING SPLIT INTO A PLURALITY OF SECTORS FOR EASY RENEWAL AND MOUNTING IN SAID GROOVE, SAID SPLIT RING CORRESPONDING IN DIAMETER TO SAID FIRST PORTION OF SAID BORE AND BEING SLIDABLY RECEIVED THEREIN TO RETAIN SAID SPLIT RING IN SAID GROOVE, A ROLLER THRUST BEARING ENGAGING THE OPPOSITE SIDE OF SAID SPLIT RING, A RETAINING RING SLIDABLY RECEIVED BETWEEN SAID FIRST CYLINDRICAL PORTION OF SAID SECOND MEMBER AND SAID FIRST RELATIVELY LARGE PORTION OF SAID STEPPED BORE AND ENGAGING SAID THRUST BEARING ON THE OPPOSITE SIDE THEREOF FROM SAID SPLIT RING, A PLURALITY OF SET SCREWS MOUNTED IN SAID OUTER TUBULAR MEMBER AND ENGAGING SAID RETAINING RING FOR SECURING SAID RETAINING RING IN SAID OUTER TUBULAR MEMBER, SAID RETAINING RING HAVING RECESSES FOR RECEIVING SAID SET SCREWS, A LOCKING COLLAR RECEIVED AROUND SAID OUTER TUBULAR MEMBER AND COVERING SAID SET SCREWS FOR PREVENTING ACCIDENTAL LOOSENING OF SAID SCREWS, AND MEANS FOR RETAINING SAID LOCKING COLLAR ON SAID OUTER TUBULAR MEMBER.