LIQUID TRANSFER APPARATUS WITH PRESSURE-SENSITIVE AUTOMATIC SHUT-OFF NOZZLE

摘要

A vented tank has a receptacle fitting at its fill port that mates with a nozzle on the end of a supply hose. Both the receptacle fitting and the nozzle have normally closed valves which open in response to mating of the two parts. The nozzle fitting is equipped with a normally closed snap acting valve which is cocked open during the filling operation and snaps closed in response to abrupt rise in back pressure. During the filling operation a tank vent is open but closes in response to rise in the liquid level and thereby creates the back pressure. The tank vent also closes automatically if the tank is turned over.