Vacuum insulated conduits and insulated joining means

Claim 1

INSULATED CONDUIT COMPRISING, AN INNER TUBULAR MEMBER FOR TRANSMISSION THERETHROUGH OF FLUIDS, AN OUTER TUBULAR MEMBER COAXIALLY DISPOSED ABOUT SAID INNER MEMBER TO PROVIDE AN ANNULAR SPACE THEREBETWEEN, AN INTERMEDIATE TUBULAR MEMBER FOR REFLECTING RADIANT HEAT ENERGY, MEANS FOR POSITIONING SAID INTERMEDIATE TUBULAR MEMBER WITHIN SAID SPACE IN SPACED RELATION TO SAID INNER AND OUTER MEMBERS, CLOSURE MEANS FOR THE OPPOSITE END OF SAID ANNULAR SPACE COMPRISING INDIVIDUAL ANNULAR WALLS SEALINGLY CONNECTED TO EACH OF SAID INNER AND OUTER MEMBERS, EACH OF SAID WALLS BEING FORMED WITH A SUBSTANTIALLY V-SHAPED CROSS-SECTION TO PROVIDE A RELATIVELY LONG HEAT CONDUCTING PATH BETWEEN SAID INNER AND OUTER MEMBERS, MEANS FOR EVACUATING SAID ANNULAR SPACE, AND FLEXIBLE TUBULAR MEANS INTERPOSED IN SAID INNER MEMBER FOR PERMITTING RELATIVE MOVEMENT OF THE LATTER WITH RESPECT TO THE OTHER OF SAID TUBULAR MEMBERS UPON PASSAGE THERETHROUGH OF A GIVEN FLUID.