Tanker for shipping liquefied hydrocarbon gas

Claim 1

A SHIP STRUCTURE FOR TRANSPORTING LIQUIFIED PETROLEUM GAS, COMPRISING IN COMBINATION AN OUTER HULL, AN INNER HULL MOUNTED IN SPACED RELATIONSHIP WITHIN SAID OUTER HULL AND DEFINING WITHIN SAID OUTER HULL A GAS TIGHT ENCLOSURE, SUPPORT MEMBERS FIXED AT SPACED POINTS ON THE BOTTOM AND SIDE WALLS OF SAID INNER HULL, AND PROJECTING INTO SAID INNER HULL, SAID SUPPORT MEMBERS BEING COMPRESSIBLE AND EXPANSIBLE IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO SAID INNER HULL, A LIQUIFIED PETROLEUM GAS TANK FREELY SLIDABLY MOUNTED IN HEAT INSULATING RELATIONSHIP ON SAID SUPPORTS, A HEAT INSULATING LAYER COVERING THE OUTER SURFACES OF SAID TANK, A HARD HEAT INSULATING LAYER COVERING SAID TANK AT POINT CONTACTING SAID SUPPORTS, SAID TANK BEING SPACED FROM THE INNER HULL AROUND THE ENTIRE PERIPHERY OF THE TANK, AND SLIDABLE ON SAID SUPPORTS TO PERMIT ADJUSTMENT OF THE POSITION OF THE TANK RELATIVE TO THE INNER HULL THE SPACE BETWEEN THE INNER HULL AND THE TANK BEING EASILY ACCESSIBLE FOR INSPECTING SAID HEATING INSULATING LAYER.