Today in 1892, US Patent 473737 A was issued, an invention of Peter F. Gaynor, for his “Beer-Drawing Apparatus.” There’s no Abstract, although in the description it includes this summary:

My invention relates to improvements in beer-drawng apparatus and the object of my invention is to produce a simple apparatus by means of which beer may be conveniently drawn under pressure from the cask and which may be inserted in the cask without spilling any beer or freeing any gas.