Today in 1988, US Patent 4720076 A was issued, an invention of Roger J. Hyde, for his “Carbon Dioxide Gas Pressure Dispense System for Beer.” Here’s the Abstract:
A dispense tape (10) to control the flow of carbonated beers is configured to minimize pressure drop and turbulence in beer flow to an outlet nozzle (14) when open, the tap having flow restrictor means (52) operatively connected as a downstream extension of the tap valve (30), located in the path of beer flowing from the valve, arranged only to affect beer flow when the tap is nearly closed and configured to substantially restrict beer flow to maximize pressure drop and turbulence; choice of nozzle length/bore ratio enabling either a creamy flow or a squib of beer to be dispensed.
