Patent ID: 8549992
Filing Date: 2013-10-08
Classification: A47J,F04B

Abstract:
1. Apparatus for preparing beverages comprising: a module for distributing a beverage by supplying a pressurized liquid; gas supply means for supplying the module with pressurized gas; a liquid feed chamber, suitable for communicating with the gas supply means in order to pressurize the liquid in the chamber and to distribute a quantity of liquid under a certain pressure through the module, the chamber being defined by at least one elastic wall and a core of a liquid pumping device, the elastic wall separating the gas from the liquid in a sealed manner and, the wall being configured to deform elastically and thereby reduce the volume of liquid in the chamber under the effect of the gas against an exterior of the wall, the reduction in volume of liquid in the chamber driving liquid outside the chamber and towards the module, and the elastic wall is mounted on the core to define the chamber, an external rigid tubular body positioned against the elastic wall with ends of the tubular body engaged to corresponding ends of the core to form, between the internal surface of the tubular body and the external surface of the elastic wall, a zone into which the gas is blown under pressure; a feed tank for filling the chamber with liquid, the said chamber having a smaller capacity than the feed tank and being arranged, in a filling configuration, to communicate with the fill tank in order to be filled with liquid by a suction effect created when the gas stops compressing the exterior of the wall and when the wall returns to an initial position under its own elasticity.