Today in 1885, US Patent 318306 A was issued, an invention of Adam Schultz, for his “Beer Keg Washer.” There’s no Abstract, though it’s described this way in the application:

My invention relates to apparatus or machinery for scrubbing or washing the external surfaces of beer-kegs, barrels, and similar articles, and has for its object the construction of an apparatus in which the entire operation of charging the Same with kegs, scrubbing the kegs, and finally discharging the cleaned kegs from said apparatus shall be accomplished mechanically, without manual labor, and with the smallest possible. consumption of water. The apparatus is also designed to clean the kegs much more rapidly than by any other method of scrubbing with which I am acquainted.