Bonded coupling liner fabrication and installation process

Claim 1

IN A METHOD OF PREPARING A TUBULAR MEMBER HAVING A TAPERED AND INTERNALLY THREADED PORTION AT ONE END THEREOF FOR SUBSEQUENT SEALING CONNECTION TO AN EXTERNALLY TAPERED AND THREADED PIPE TO BE THREADED THEREINTO; THE IMPROVEMENT COMPRISING SCREWING AN EXTERNALLY THREADED HOLLOW BARRIER HAVING AN ADHESION RESISTANT ANNULAR FACE AT ONE END THEREOF INTO THE TUBULAR MEMBER TO POSITION THEN ANNULAR FACE OF THE BARRIER INTERMEDIATE THE AXIAL EXTENT OF THE TAPERED AND INTERNALLY THREADED PORTION OF THE TUBULAR MEMBER AND FACING FROM SAID ONE END OF THE TUBULAR MEMBER, PROVIDING A RESILIENT AND CORROSION RESISTANT LINER IN THE TUBULAR MEMBER THAT IS BONDED TO THE PART OF THE TAPERED AND INTERNALLY THREADED PORTION OF THE TUBULAR MEMBER FACED BY THE FACE OF THE BARRIER BY PROVIDING A POLYMERIZABLE ELASTOMER, ROLLING A PORTION OF THE TUBULAR MEMBER FACED BY THE FACE OF THE BARRIER BY PROVIDING A POLYMERIZABLE ELASTOMER, ROLLING A PORTION OF THE ELASTOMER TO AN ELONGATED SHAPE AND PROGRESSIVELY PRESSING THE LONGITUDINAL EXTENT OF SUCH ELONGATED PORTION OF THE ELASTOMER AGAINST THE INSIDE OF THE TUBULAR MEMBER ADJACENT THE BARRIER AND AGAINST THE FACE OF THE BARRIER ALONG THE PATH DIRECTED TO CIRCUMSCRIBE THE INTERIOR OF THE TUBULAR MEMBER, CONTINUING THE LAST STEP UNTIL THE ELASTOMER HAS BEEN BUILT UP INTO A LAYER ADJACENT THE BARRIER HAVING A THICKNESS OF ABOUT THE RADIAL ETENT OF THE BARRIER FACE AND HAVING AN AXIAL ANNULAR EXTREMITY ABUTTING THE FACE OF THE BARRIER; POLYMERIZING THE LAYER OF ELASTOMER TO CONSTITUTE THE RESILIENT LINER AND TO BOND THE LINER TO THE TUBULAR MEMBER, AND REMOVING THE BARRIER.