Double bayonet insulated transfer line coupling

Claim 1

IN A FLUID TRANSFER LINE COMPRISING AT LEAST THREE ADJACENT VACUUM INSULATED SECTIONS SUPPORTED COAXIALLY IN ENDTO-END RELATIONSHIP, COUPLING MEANS FOR INTERCONNECTING SAID SECTIONS AND PROVIDING FOR TRANSLATORY REMOVAL OF THE INTERMEDIATE SECTION LATERALLY FROM SAID LINE; SAID COUPLING MEANS COMPRISING FIRST AND SECOND SLEEVES WHICH SLIDABLY RECEIVE FIRST AND SECOND END PORTIONS OF SAID INTERMEDIATE SECTION, RESPECTIVELY, SAID SLEEVES ALSO SLIDABLY RECEIVING END PORTIONS OF THE SECTIONS ON EITHER SIDE OF SAID INTERMEDIATE SECTION, RESPECTIVELY, EACH OF SAID SLEEVES BEING DEFINED BY AN INNER TUBING AND AN OUTER TUBING WHICH INCLOSE A VACUUM SPACE THEREBETWEEN, THE INNER TUBING OF EACH SLEEVE HAVING A MINIMUM INNER DIAMETER WHICH EXCEEDS THE MAXIMUM OUTER DIAMETERS OF THE END PORTIONS OF THE VACUUM INSULATED SECTIONS, FIRST AND SECOND SEALING MEANS POSITIONED AT DIFFERENT LOCATIONS ALONG THE AXIS OF EACH END PORTION TO PROVIDE AT LEAST TWO FLUID-TIGHT SEALS BETWEEN EACH END PORTION LOCATED AT ONE END OF A SECTION END TION, ONE SEAL BEING LOCATED AT ONE END OF A SECTION END PORTION AND SEALINGLY ENGAGING AN INTERMEDIATE PORTION END ITS OVERLAPPING SLEEVE, THE OTHER SEALING BEING LOCATED INWARDLY FROM THE ONE END OF A SECTION END PORTION AND SEALINGLY ENGAGING THE SLEEVE AT THETERMINAL END OF SAID SLEEVE, AND MEANS FOR INTERLOCKING EACH SLEEVE WITH THE TWO ADJACENT VACUUM INSULATED SECTIONS RECEIVED BY THE SLEEVES, SAID INTERLOCKING MEANS BEING ADAPTED TO RELEASE EACH SLEEVE FOR SLIDING MOVEMENT OF BOTH OF SAID SLEEVES IN OPPOSITE DIRECTIONS ALONG SAID SECTIONS TO POSITION SAID SLEEVES BEYOND THE ENDS OF SAID INTERMEDIATE SECTION FOR TRANSLATORY REMOVAL OF SAID INTERMEDIATE SECTION LATERALLY FROM SAID LINE.