Today in 1962, US Patent 3035603 A was issued, an invention of Walter H. Despres and Phillip D. Jamieson, for their “Beer Barrel Tapper.” There’s no Abstract, though it’s described this way in the application:

This invention relates to a new and improved beer barrel tapper, that is, a device for tapping beer kegs or barrels and has particular reference to a device of the type set forth wherein a compressed gas is introduced into the barrel or the like for removing the liquid contents, such as beer, under pressure.