Patent ID: 8505442

Claim:
A beer frothing device for frothing beer poured in a vessel by squirting a pressurized gas through a nozzle into the beer with the nozzle submerged in the beer, the device comprising: a pressurized gas supply; a squirting mechanism connected to the gas supply and having the nozzle for squirting the gas; a lifting mechanism having a threaded bar configured to threadably connect with the squirting mechanism, the threaded bar being rotatable to move the squirting mechanism in a manner such that the squirting mechanism is raised and lowered in a vertically reciprocating movement with a half track between a start point, at which the nozzle is positioned right above the vessel, and a lower point, at which the nozzle is submerged at a predetermined depth in the beer poured in the vessel; a start switch configured to activate the lowering of the squirting mechanism; and a cutoff valve for cutting off, in a normally closed state, the squirting of the gas through the nozzle, the cutoff valve being configured to automatically open when the nozzle reaches a preset submerge position in the beer poured in the vessel in the movement of the squirting mechanism to automatically introduce gas into the beer.