Cryogenic fluid transfer conduit

Claim 1

A VACUUM-INSULATED DOUBLE-WALLED FLUID TRANSFER CONDUIT, COMPRISING AN INNER CONDUIT FOR SUCH FLUID; A LARGER OUTER JACKET CONCENTRICALLY SPACED AROUND SAID INNER CONDUIT SO AS TO FORM AN EVACUABLE ANNULAR INSULATION SPACE THEREBETWEEN, THE CONTINUITY OF THE INNER AND OUTER SURFACES OF THE OUTER JACKET BEING DISRUPTED TO FORM A PLURALITY OF ANNULAR ANTICLINAL-LIKE PROTRUSIONS WHICH PROVIDE LONGITUDINAL FLEXIBILITY SPACED APART BY NONDISRUPTED PORTIONS OF SUCH SURFACES WHICH PROVIDE LATERAL STIFFNESS, SUCH PROTRUSIONS CONSTITUTING A MINOR PORTION OF SUCH SURFACES RELATIVE TO THE NONDISRUPTED PORTIONS; INSULATING MATERIAL SUBSTANTIALLY FILLING THE INSULATING SPACE MEANS FOR GAS TIGHTLY JOINING THE ENDS OF SAID OUTER JACKET TO SAID INNER CONDUIT, AT LEAST ONE SUCH JOINING MEANS COMPRISING INTERSECTING OPPOSITELY ORIENTED FRUSTO-CONICAL ANNULAR SURFACES FORMED OF SEPARATE FRUSTO-CONICAL ANNULAR RINGS GAS-TIGHTLY JOINED TOGETHER IN BASE-TO-APEX END FASHION, SUCH JOINING MEANS IN COMBINATION WITH SAID OUTER JACKET AND SAID INNER CONDUIT BEING CONSTRUCTED TO MAINTAIN A PRESSURE BELOW ABOUT 30 MICRONS OF MERCURY WITHIN SAID INSULATION SPACE.