Cryogenic transfer line arrangement

Claim 1

A SEMI-FLEXIBLE CYROGENIC TRANSFER LINE ADAPTED TO BE MADE IN LONG CONTINUOUS LENGTHS AND SUPPLIED IN COILED FORM, SAID LINE COMPRISING: LATERALLY AND LONGITUDINALLY FLEXIBLE CRYOGENIC TRANSFER LINE MEANS FOR CONDUCTING CRYOGENIC FLUIDS AND CHARACTERIZED BY BEING COILABLE IN LONG LENGTHS AND CUT TO FIT SPECIFIC APPLICATIONS, SAID TRANSFER LINE MEANS COMPRISING: A SEMI-FLEXIBLE INNER TUBE FORMED FROM A MATERIAL HAVING HIGH SURFACE REFLECTIVITY, A HEAT INSULATING SPACER MEMBER RECEIVED OVER SAID INNER TUBE IN SPIRALLY WOUND RELATION THEREALONG AND HAVING A LEAD IN THE RANGE OF FROM ABOUT SIX TO ABOUT TEN INCHES, SAID SPACER MEMBER BEING OF QUADRILATERAL TRANSVERSE CONFIGURATION, A SEMI-FLEXIBLE OUTER TUBE FORMED FROM A MATERIAL HAVING HIGH SURFACE REFLECTIVITY AND RECEIVED IN CONCENTRIC RELATION OVER SAID INNER TUBE AND SAID SPACER, SAID INNER AND OUTER TUBES BEING IN BINDING ENGAGEMENT WITH SAID SPACER MEMBER ALONG THE LENGTH THEREOF WHEREBY THERMAL CONTRACTION OF SAID INNER TUBE UNDER THE PRESENCE OF CRYOGENIC SUBSTANCES CONTAINED THEREIN IS TRANSMITTED TO SAID OUTER TUBE, AND A PROTECTIVE FLEXIBLE COATING COVERING THE OUTER SURFACE OF SAID OUTER TUBE, WITH THE INNER AND OUTER SURFACES OF SAID INNER TUBE AND THE INNER SURFACE OF SAID OUTER TUBE BEING SUBSTANTIALLY GREASE FREE AND UNCOATED FOR MAXIMUM REFLECTIVITY CHARACTERISTICS, AND SAID SURFACES AND THE OUTER SURFACE OF SAID OUTER TUBE BEING FREE OF BLACK BODY TYPE RADIATION TRAPS.