Today in 1988, US Patent 4730463 A was issued, an invention of Ted M. Stanfill, for his “Beverage Dispenser Cooling System.” Here’s the Abstract:
A beverage dispensing system further cools the beverage where it is dispensed at a considerable distance from the beverage storage container. The beverage conduit between the storage and dispensing sites is carried in a bundle located within an insulated jacket conduit. The bundle also contains parallel chilled liquid lines through which chilled liquid is circulated. A concentric coil is located at the dispensing site. A manifold connects the parallel beverage and chilled liquid lines to the concentric coil and to the dispensing valve.