Today in 1985, US Patent 4516698 A was issued, an invention of Vincent J. Cerrato, for his “Keg-Pump Construction.” Here’s the Abstract:

A keg-tapping device wherein a probe is selectively actuable within a tap body, between axial positions of communication with and cut-off from the inner volume of the keg, to which it may be attached. The probe extends upwardly beyond the tap body and carries an axially reciprocal air pump at its upper end, while a beverage-dispensing port is open laterally, at a location beneath the pump and above the tap body. A pressure-relief valve with external actuating access is carried by the probe, and the arrangement is such that the probe and all components mounted thereto are bodily rotatable, over a full 360 degrees of lateral-discharge direction for beverage delivered at the discharge port. Conveniently, a flexible hose connects the discharge port to a selectively operable dispensing valve, and the dispensing valve is therefore flexibly adaptable, without keg movement, to serve glasses within a maximum radius (hose length), whatever the azimuth direction at which a glass is to be served.