Union with provision for misalignment

Claim 1

A UNION FOR CONNECTING MISALIGNED PIPES, SAID UNION COMPRISING SEPARATE PIPE FITTINGS FOR THE RESPECTIVE PIPES, MEANS FOR CONNECTING THE FIRST FITTING TO ONE PIPE, A CONCAVE SPHERICAL ZONE END FACE ON THE SECOND FITTING, MEANS FOR CONNECTING THE SECOND FITTING TO ANOTHER PIPE, OTHER MEANS FOR CONNECTING THE FITTINGS TO ONE ANOTHER INCLUDING THREADS ON THE CIRCUMFERENCE OF THE FIRST FITTING, AND A NUT THAT SCREWS OVER SAID THREADS, A SHOULDER ON THE SECOND FITTING HAVING A CONVEX SPHERICAL ZONE SURFACE, A FLANGE ON THE NUT OVERLAPPING THE SHOULDER AND HAVING A CONCAVE SPHERICAL ZONE SURFACE FOR CONTACT WITH THE SHOULDER OF THE NUT, A SEALING ELEMENT TIGHTLY CLAMPED BETWEEN THE END FACES OF THE FITTINGS, SAID SEALING ELEMENT HAVING A FIRST FACE CONFRONTING THE END FACE OF THE FIRST FITTING AND A CONVEX SPHERICAL ZONE SURFACE CONFRONTING THE END FACE OF THE SECOND FITTING, AND A HOLDER FOR HOLDING THE SEALING ELEMENT LOCATED IN THE NUT AND SUBSTANTIALLY CENTERED IN THE UNION DURING ASSEMBLY AND DIS-ASSEMBLY OF THE UNION, THE HOLDER ENGAGING THE SEALING ELEMENT AND AN INSIDE SURFACE OF THE NUT AND BEING MOVABLE AXIALLY ALONG SAID INSIDE SURFACE DURING ASSEMBLY AND DIS-ASSEMBLY OF THE UNION.