Fitting assembly for metal tubes

Claim 1

A THREE-PIECE FLUID-TIGHT TUBE FITTING ASSEMBLY COMPOSED OF: A PAIR OF THREADINGLY INTERFITTED, COAXIALLY CONNECTABLE AND RELATIVELY MOVABLE MALE AND FEMALE METAL FITTING MEMBERS HAVING AN INTERNAL BORE MEANS COAXIALLY RECEPTIVE OF ONE END OF A CYLINDRICAL METAL TUBE TO BE SEALED, EACH MEMBER HAVING ONE OF A PAIR OF INTERSECTIONALLY DISPOSED, INTERNAL, ANNULAR, CONIC SURFACES, WHICH, WITH THE EXTERNAL CYLINDRICAL SURFACE OF THE TUBE MOUNTED THEREIN COOPERATIVELY DEFINE A VARIABLE VOLUME ANNULAR CHAMBER OF SUBSTANTIALLY TRIANGULAR CROSS-SECTION ABOUT THE TUBE; A SPRING-LIKE, RESILIENT, SHOCK ABSORBING ANNULAR METAL COMBINATION SEALING, ANCHORING AND LOCKING RING, OF UNBROKEN UNITARY FORMATION MOUNTED ABOUT SAID TUBE WITHIN SAID CHAMBER; SAID RING COMPRISING A PAIR OF INTERSECTINGLY RELATED ANNULAR CONIC WALL PORTIONS OF RELATIVELY THIN CROSS-SECTION INTEGRALLY JOINED AT THEIR ENDS OF GREATER DIAMETER AND EACH RESPECTIVELY OPPOSING AND ANGULARLY INTERSECTING ONE OF SAID ANNULAR CONIC SURFACES WHEREBY SAID PORTIONS ARE ADAPTED TO BE ENGAGED BY SAID SURFACES AND RESILIENTLY DEFLECTED TOWARD ONE ANOTHER ABOUT THEIR INTERJOINED ENDS TO PRODUCE IMPERMANENT AXIAL AND INWARD RADIAL DEFORMATION OF SAID RING IN RESPONSE TO MOVEMENT OF SAID SURFACES RELATIVELY TOWARD ONE ANOTHER UPON COMPRESSION OF SAID CHAMBER; AN ANNULAR ANCHORING EDGE FORMED AT THE RADIALLY INNERMOST END OF EACH OF SAID RING PORTIONS NORMAL TO THE LONGITUDINAL AXES OF SAID CONIC WALL PORTIONS AND SAID EDGE BEING ADAPTED TO BITE RADIALLY INTO THE EXTERNAL SURFACE OF SAID TUBE AND THEREBY AXIALLY