Today in 1902, US Patent 694477 A was issued, an invention of Frank E. Howland, for his “Valve.” There’s no Abstract, although in the description it includes this summary:

My invention relates to certain new and useful improvements in apparatus for carbonating and dispensing liquids. More particularly, my invention relates to a device adapted to be applied to casks, kegs, or other receptacles whereby in its use it is practicable to completely fill the receptacles in the first instance and in such filling and as the liquid is dispensed a constant recarbonating process is instituted which continues until all of the liquid is Withdrawn from the receptacle.

The device is adapted to a receptacle being filled, and by a certain manipulation of the valve part of the device an inlet into the receptacle, which permits the filling, and a vent or air-escape is provided, thus enabling the receptacle to be completely filled.