Cryogenic tank

Claim 1

IN A TANKER HAVING A HULL, A TANK FOR STORING AND TRANSPORTING LIQUEFIED GASES AT CRYOGENIC TEMPERATURES AND ATMOSPHERIC PRESSURE CONPRISING (A) AN INNER IMPERMEABLE TANK OF A MATERIAL RETAINING ITS DUCTILITY AT CRYOGENIC TEMPERATURES, (B) AN OUTER IMPERMEABLE TANK OF A MATERIAL RETAINING ITS DUCTILITY AT CRYOGENIC TEMPERATURES, (C) MEANS MOUNTING SAID INNER TANK IN SAID OUTER TANK FOR EFFECTIVELY FREE AND INDEPENDENT MOVEMENT RELATIVE THERETO, SAID MEANS COMPRISING FLUID ACTUATOR MEANS ARRAYED ABOUT SAID OUTER TANK FOR LIMITED DISPLACEMENT RELATIVE THERETO ALONG PREDETERMINED AXES, ACTUATOR PISTON RODS PROJECTING FROM SAID ACTUATOR MEANS AND CONTROLLABLY DISPLACEABLE ALONG PREDETERMINED AXES PERPENDICULAR TO THE PLANES OF THEIR LAST MENTIONED AXES, SAID RODS CONNECTED AT THEIR DISTAL ENDS TO SAID INNER TANK, (D) SAID INNER AND OUTER TANKS DEFINING A CHAMBER THEREBETWEEN, (E) MEANS FOR EVACUATING THE AIR IN SAID CHAMBER AND FOR MAINTAINING A VACUUM THEREIN, (F) GAS DETECTION MEANS ASSOCIATED WITH SAID CHAMBER AND ADAPTED TO DETECT THE PRESENCE OF GAS THEREIN, AND (G) THERMAL INSULATION MEANS COVERING SIAD OUTER TANK, AND (H) INSULATING BEARING MEANS INTERPOSED BETWEEN SAID OUTER TANK AND THE INTERIOR OF SAID HULL WHEREBY SAID HULL SUPPORTS SAID OUTER TANK.