Nose-pieces for isobaric liquid-drawers

Claim 1

IN A NOSE-PIECE FOR ISOBARIC LIQUID-DRAWERS USED FOR FILLING RECEIVERS WITH A LIQUID FROM A SOURCE OF LIQUID AND OF THE TYPE HAVE A CONVENTIONAL LIQUID VALVE WITHIN THE NOSE-PIECE BODY AND A CONVENTIONAL GAS NOZZLE WITH PORTS FOR CHARGING THE RECEIVERS WITH GAS, EXHAUSTING THE GAS FROM THE RECEIVER DURING THE FILLING OPERATION THEREOF AND LIMITING THE LIQUID LEVEL IN SAID RECEIVERS, THE IMPROVEMENT COMPRISING: A DISPLACEABLE RIGID GAS AND LIQUID RETAINING DEVICE IN THE NOSE-PIECE BODY AND DEFINING AN ANNULAR PASSAGE THEREBETWEEN IN ALL POSITIONS OF SAID DEVICE, AND MEANS FOR DISPLACING SAID RETAINING DEVICE UPON OPENING OF THE LIQUID VALVE TO A POSITION IN SAID NOSE-PIECE BODY IN WHICH THE ANNULAR PASSAGE IS A MAXIMUM, WHEREBY THE LIQUID FLOWS WITHOUT LOSS OF CHARGE THROUGH SAID ANNULAR PASSAGE WITH SAID LIQUID VALVE OPEN TO FILL SAID RECEIVER TO A LEVEL DETERMINED BY THE GAS NOZZLE PORTS, SAID RIGID GAS AND LIQUID RETAINING DEVICE UPON CESSATION OF THE FLOW OF LIQUID AND WHILE SAID LIQUID VALVE REMAINS OPEN, COOPERATING WITH THE NOSE-PIECE BODY TO EFFECT A SEAL THEREBETWEEN WHICH IS FORMED DUE TO SURFACE TENSION OF THE LIQUID WHICH RETAINS THE LIQUID IN THE NOSE-PIECE BODY, ENTRAPS THE GAS REMAINING ABOVE THE LIQUID WITHIN THE FILLED RECEIVER AND PREVENTS THE FLOW OF SAID GAS TO THE SOURCE OF LIQUID.