Swivel coupling for coupling flexible and rigid tubular members in end to end relationship

Claim 1

IN COMBINATION A FLEXIBLE TUBULAR MEMBER HAVING AN END, A RIGID TUBULAR MEMBER AND MEANS FOR COUPLING SAID MEMBERS IN END TO END RELATIONSHIP, SAID FLEXIBLE TUBULAR MEMBER COMPRISING A HOLLOW FLEXIBLE TUBE AND A WIRE HELIX OF GREATER MEAN DIAMETER THAN THE MEANS DIAMETER OF SAID TUBE DISPOSED THEREIN, SAID FLEXIBLE TUBULAR MEMBER HAVING A CORRUGATED SURFACE, SAID RIGID TUBULAR MEMBER COMPRISING A HOLLOW RIGID TUBE HAVING A FLANGED END, SAID COUPLING MEANS COMPRISING A UNITARY ELONGATED, HOLLOW, FLEXIBLE SLEEVE OR GREATER RIGIDITY THAN SAID FLEXIBLE TUBULAR MEMBER AND A BEARING MEMBER, SAID BEARING MEMBER COMPRISING A HOLLOW, LONGITUDINALLY SPLIT BUSHING AND BEING DISPOSED ABOUT SAID RIGID TUBULAR MEMBER IN SNUG ROTATABLE ENGAGEMENT THEREWITH AND ADJACENT SAID FLANGE AND HAVING A RELATIVELY LOW CO-EFFICIENT OF FRICTION WITH SAID RIGID TUBULAR MEMBER, SAID SLEEVE HAVING TWO END PORTIONS, ONE SAID END PORTION OF SAID SLEEVE EXTENDING LONGITUDINALLY AND CONCENTRICALLY WITH A PORTION OF SAID FLEXIBLE TUBULAR MEMBER ADJACENT WITH END THEREOF AND HAVING A SURFACE ENGAGING SAID CORRUGATED SURFACE OF SAID FLEXIBLE TUBULAR MEMBER, THE OTHER SAID END PORTION OF SAID SLEEVE BEING DISPOSED OVER AND IN ENGAGEMENT WITH SAID BEARING MEMBER AND EXTENDING LONGITUDINALLY AND CONCENTRICALLY WITH SAID RIGID TUBULAR MEMBER AND BEARING MEMBER FOR A PORTION OF THE LENGTH OF SAID RIGID TUBULAR MEMBER AND FOR THE DIAL LENGTH OF SAID BEARING MEMBER, SAID OTHER END PORTION OF SAID SLEEVE HAVING AN INTEGRAL, INWARDLY EXTENDING CIRCUMFERENTIAL LIP AT THE END THEREOF REMOTE FROM SAID ONE END PORTION OF SAID SLEEVE, SAID LIP HAVING AN INTERNAL DIAMETER GREATER THAN THE EXTERNAL DIAMETER OF SAID RIGID TUBULAR MEMBER AND LESS THAN THE EXTERNAL DIAMETER OF SAID BEARING MEMBER, SAID BEARING MEMBER ENGAGING AND EXTENDING BETWEEN SAID FLANGE OF SAID RIGID TUBULAR MEMBER AND SAID LIP OF SAID SLEEVE.