Today in 1964, US Patent 3129730 A was issued, an invention of John F. Simon, for his “Tapping System For Liquid Container or the Like.” There’s no Abstract, although in the description it includes this summary:

This invention relates to a tapping system for liquid containers or the like such as, for example, casks having a gas-charged beverage or other liquid therein. In particular, this invention relates to a quick coupling and uncoupling tapping system for new beer kegs or the like or for the conversion of conventional beer kegs or the like to provide prompt placement of liquid containers in service, the removal thereof from service when substantially empty and the maintenance of prompt and sound delivery of the liquid during service in optimal condition.