Self-flaring tube coupling

Claim 1

A SELF-FLARING COUPLING COMPRISING: A COUPING BODY HAVING A FLOW PASSAGE OPENING OUTWARDLY THROUGH A COUNTER-BORE IN AN EXTERNALLY THREADED END OF THE BODY, SAID COUNTERBORE HAVING A GRADUALLY CONVERGIG CONICAL THROAT EXTENDING AXIALLY INWARDLY FROM A STEEPLY TAPERING CONICAL MOUTH OF THE COUNTERBORE TOWARD THE BOTTOM THEREOF AND TERMINATING IN A SUBSTANTIALLY CYLINDRICAL WALL AT THE BOTTOM OF THE COUNTERBORE, A HOLLOW TUBE-FLARING CONE COAXIAL WITH THE COUNTERBORE AND PROJECTING AXIALLY OUTWARDLY FROM THE BOTTOM OF THE COUNTERBORE IN RADIALLY INWARDLY SPACED RELATION FROM SAID SUBSTANTIALLY CYLINDRICAL WALL TO DEFINE THEREWTIH AN ANNULAR FLARE-TUBE-END RECEIVING CAVITY, A FLARING SLEEVE RECEIVABLE OVER THE END OF A TUBE TO BE FLARED WITH THE INNER END OF THE SLEEVE HAVING A STEEPLY SLOPING SURFACE WHOSE RADIAL DIMENSION IN SUBSTANTIALLY NOT GREATER THAN THE MAXIMUM RAIDAL DIMENSION OF SAID STEEPLY TAPERING MOUTH, SAID STEEPLY SLOPING SURFACE ADAPTED TO INITIALLY ABUT SAID STEEPLY TAPERING MOUTH WITH THE INSIDE OF THE SLEEVE ADJACENT THE INNER END DEFINING AN ANNULAR GRIPPING EDGE DEFORMABLE INTO THE TUBE UPON RADIAL INWARD DEFORMATION OF THE INNER END OF THE SLEEVE, SAID SLEEVE HAVING AN ANNULAR AREA OF REDUCED CROSS-SECTION OUTWARDLY OF SAID GRIPPING EDGE TO PROVIDE A WEAKENED FULCRUM AREA FRO CONTRACTION OF THE GRIPPING EDGE OF THE SLEEVE, SAID STEEPLY TAPERING MOUTH OF THE COUNTERBORE COOPERABLE WITH SAID STEEPLY SLOPING INNER END OF THE SLEEVE TO QUICKLY CONTRACT SAID GRIPPING EDGE INTO TUBE GRIPPIN GRELATION BY A BENDING OF THE SLEEVE IN SIAD FULCRUM AREA DURING INITIAL FORCING OF THE SLEEVE AGAINST THE STEEPLY TAPERING MOUTH, AND WITH THE GRADUALLY CONVERGING THROAT OF THE COUNTERBORE DURING FORCING OF THE SLEEVE DOWN THE CONVERGING THROAT PROVIDING AN INCREASINGLY TIGHTER GRIPPING OF THE TUBE DURING FLARING OF THE TUBE ON THE CONE, SAID TUBE END DURING FLARING RADIALLY EXTENDING INTO SAID ANNULAR CAVITY SUBSTANTIALLY FILLING THE SAME AND WITH THE INNER END OF THE SLEEVE DISPOSED SUBSTANTIALLY WHOLLY WITHIN THE GRADUALLY TAPERING WALL PORTION OF THE COUNTERBORE AND SQUEESING THE FLAREDTUBE-EN AXIALLY INWARDLY AGAINST THE INNER END OF SAID ANNULAR CAVITY, AND NUT MEANS THREADEDLY ENGAGED WITH THE EXTERNALLY THREADED END OF THE COUPLING BODY AND COOPERATING WITH THE SLEEVE FOR URGING THE SLEEVE INTO THE COUNTERBORE.