Patent ID: 7930972

Claim:
A device for preparing a frothy drink from a cartridge comprising a chamber containing a preparation for a drink the device comprising selection means for selecting the desired drink so as to activate a preparation cycle for preparing the drink comprising: a water supply device; an air supply means; a fluid conveying means; a reception unit for accepting a cartridge containing the preparation for a drink; a fluid-injection member for injecting fluid from the fluid-conveying means into the cartridge and configured so as to inject the fluid into the cartridge; an air storage member for storing a predetermined volume of air which is conveyed by the air supply means and injected under pressure into the cartridge at each drink preparation cycle so as to create a reserve pocket of compressed air in the cartridge; and at least one opening means configured to withstand the pressure of the reserve pocket of compressed air and to open from a higher pressure corresponding to the supply of water to the cartridge.