Apparatus for storing and dispensing liquefied gases

Claim 1

APPARATUS FOR STORING AND DISPENSING A LIQUEFIED GAS HAVING A BOILING POINT SUBSTANTIALLY BELOW ATMOSPHERIC TEMPERATURE AT NORMAL ATMOSPHERIC PRESSURE COMPRISING A THERMALLY INSULATED CONTAINER FOR THE LIQUEFIED GAS, A LIQUID WITHDRAWAL PIPE OPENING AT A POINT NEAR TO THE BOTTOM OF SAID CONTAINER AND EXTENDING THROUGH THE TOP THEREOF, A PRESSURE RAISING COIL LOCATED BELOW THE LEVEL OF THE BOTTOM OF SAID CONTAINER, A LIQUID FEED LINE CONNECTING SAID LIQUID WITHDRAWAL PIPE WITH ONE END OF SAID PRESSURE RAISING COIL, A VAPOUR FEED LINE CONNECTING THE OTHER END OF SAID PRESSURE RAISING COIL WITH THE VAPOUR SPACE OF SAID CONTAINER THROUGH AN AUTOMATIC VALVE ARRANGED TO OPEN WHEN THE PRESSURE IN SAID CONTAINER FALLS BELOW A PREDETERMINED VALUE, A JACKET SURROUNDING THE PART OF THE LIQUID FEED LINE ABOVE THE LEVEL OF THE BOTTOM OF SAID CONTAINER AND HAVING A CONNECTION TO SAID LIQUID WITHDRAWAL PIPE THROUGH VALVE MEANS ARRANGED TO MAINTAIN A PRESSURE DROP BETWEEN SAID LIQUID FEED LINE AND SAID JACKET, A LIQUID SERVICE CONNECTION TO SAID JACKET, AND A FILLING LINE CONNECTED TO THE VAPOUR SPACE OF SAID CONTAINER THROUGH AN AUTOMATIC VALVE ARRANGED TO OPEN WHEN THE PRESSURE IN SAID CONTAINER EXCEEDS SAID PREDETERMINED VALUE AND TO THE LIQUID SPACE OF SAID CONTAINER THROUGH A LIGHTLY THERMALLY INSULATED LIQUID STORAGE VESSEL.