Portable insulated storage tanks and valve means

Claim 1

A PORTABLE, INSULATED TANK FOR HOUSING A LIQUID HAVING A TEMPERATURE DIFFERING WIDELY FROM THE AMBIENT TEMPERATURE COMPRISING A FLUID AND VAPOUR IMPERVIOUS INNER SHELL FORMED OF A MATERIAL WHICH IS RELATIVELY INSENSITIVE TO THE TEMPERATURE OF THE LIQUID TO BE CONTAINED THEREIN, AN OUTER SHELL SPACED FROM THE INNER SHELL WITH AN INSULTING SPACE INBETWEEN, A THERMAL INSULATION HAVING A LOW COEFFICIENT OF THERMAL CONDUCTIVITY IN THE INSULATION SPACE BETWEEN THE INNER AND OUTER SHELLS, PRESSURE RESPONSIVE MEANS COMMUNICATING THE INTERIOR OF THE TANK WITH THE EXTERIOR FOR THE RELEASE OF VAPORS FROM WITHIN THE TANK WHEN THE PRESSURE THEREIN EXCEED A PREDETERMINED MAXIMUM, A PORT EXTENDING THROUGH SAID INNER AND OUTER SHELLS AND INSULATION SPACE FOR THE PASSAGE OF LIQUID THERETHROUGH INTO AND OUT OF THE TANK, A VALVE IN COMMUNICATION WITH SAID PORT FOR THE CONTROL OF LIQUID FLOW THROUGH SAID PORT, AND MEANS FOR SUPPORTING THE INNER AND OUTER SHELLS WITH THE INSULATION SPACE THEREBETWEEN, SAID LAST MENTIONED MEANS COMPRISING AN ELONGATE TUBULAR MEMBER EXTENDING LENGTHWISE THROUGH THE INTERIOR OF THE TANK AND STRUTS EXTENDING OUTWARDLY FROM THE TUBULAR MEMBER TO THE INNER SHELL, SAID TUBULAR MEMBER COMMUNICATING WITH THE SAID PORT AND WITH A DISCHARGE LINE HAVING ONE END NEAR THE BOTTOM OF THE INNER SHELL AND THE OTHER END IN THE TUBULAR MEMBER FOR PASSAGE OF THE LIQUID THROUGH THE TUBULAR MEMBER INTO AND OUT OF THE TANK.