Today in 1885, US Patent 331251 A was issued, an invention of George L. Kearney, for his “Apparatus For Filling Kegs With Beer.” There’s no Abstract, although in the description it includes this summary:

The object of this invention is to supply beer to kegs and barrels, for filling the same with out the formation of foam in the keg or other receptacle, as is now the case. This I accomplish in the manner and by the means hereinafter described and claimed.