Automatic shut-off liquid dispensing nozzle

A filling device for mounting on a first liquid container used for containing a liquid for filling a second liquid container, the filling device comprising:

• nozzle means for transferring said liquid from the first liquid container to the second liquid container, said nozzle means further comprising:
• a tubular member having a valve means therein for automatically responding to a rise in a liquid level in an output end of said nozzle means, said valve means further comprising:
• a butterfly valve having a central pivot axis within said tubular member, a first portion of said butterfly valve being on one side of said central pivot axis and a second portion of said butterfly valve being on another side of said central pivot axis, said first valve portion having a first buoyancy and said second valve portion having a second buoyancy, said first buoyancy being greater than said second buoyancy whereby said rising level of liquid in said tubular member causes the valve means to close;
• and wherein said nozzle means further comprises:
• a first nozzle portion;
• a second nozzle portion, said butterfly valve means being pivotally mounted within said second nozzle portion, said second nozzle portion being threadedly engaged over said first nozzle portion;
• and
• said first nozzle portion further comprises:
• means for locking said butterfly valve in a closed position when said second nozzle portion is threadedly rotated onto said first nozzle portion.