Method of making a fluid pressure coupling

Claim 1

THAT METHOD OF MANUFACTURING A FLUID PRESSURE COUPLING FOR USE IN AN INTERNALLY THREADED PORT HAVING AN OUTWARDLY FLARED ENTRANCE PORTION AT ITS OUTER END COMPRISING PROVIDING A METAL TUBULAR MEMBER HAVING AN EXTERNALLY THREADED LENGTH SPACED FROM ITS INNER END AND A LOCK NUT THREADEDLY ENGAGED THEREON AND EXHIBITING A SMOOTH CYLINDRICAL EXTERNAL SURFACE ADJACENT TO ITS INNER END AND OF LESS EXTERNAL DIAMETER THAN THE THREADED OUTER END THEREOF, FORMING A CYLINDRICAL CONTINUOUS SEALING RING OF HARD RELATIVELY INFLEXIBLE AND BUT SLIGHTLY DEFORMABLE MATERIAL AND HAVING AN INNER SURFACE ADAPTED TO CLOSELY CONFORM TO AND BUT SLIGHTLY GREATER IN DIAMETER THAN THE EXTERNAL SURFACE OF THE CYLINDRICAL TUBULAR MEMBER ADJACENT TO ITS INNER END AND HAVING AN EXTERNAL SURFACE ADAPTED TO CLOSELY CONFORM TO AND FORM INTIMATE CONTACT WITH THE FLARED ENTRANCE PORTION OF THE PORT TO SEALINGLY ENGAGE THE SAME, POSITIONING SAID RING OVER THE INNER END OF THE MEMBER AND ADVANCING THE RING THEREOVER TO A POSITION THEREON SPACED FROM SAID INNER END AND ADJACENT SAID LOCK NUT, AND THEREAFTER FOR DEFORMING FORMING AN EXTERNALLY THREADED LENGTH ON SAID MEMBER SPACED INWARDLY OF SAID RING FOR THREADED ENGAGEMENT WITHIN SAID PORT AND HAVING A THREAD CREST DIAMETER EXCEEDING THE INTERNAL DIAMETER OF THE SEALING RING AND THE EXTERNAL DIAMETER OF THAT PORTION OF THE TUBULAR MEMBER UNDERLYING THE RING TO SECURE SAID RING BETWEEN SAID LOCK NUT AND SAID DEFORMED THREADS.