Patent ID: 8752477
Filing Date: 2014-06-17
Classification: A47J

Abstract:
1. A device for making a beverage based on a liquid and a quantity of extractable material, said device comprising: a brewing chamber configured to contain the quantity of extractable material wherein a size of an internal volume of the brewing chamber is adjustable; a liquid supply line for supplying the liquid to the brewing chamber; a piston wherein the brewing chamber is shaped like a cylinder, wherein a size of a head of the piston is a same as a size as an opening of the brewing chamber extending between walls of the brewing chamber, and wherein the piston is movably arranged in the brewing chamber to move in the cylinder and change the internal volume of the brewing chamber; and a control unit configured to control a pressure of the liquid; wherein the control unit is figured to: wherein the piston is configured to move to increase the size of the internal volume of the brewing chamber when the measured pressure appears to be higher than the predetermined pressure, and wherein to decrease the size of the internal volume of the brewing chamber when the measured pressure appears to be lower than the predetermined pressure, wherein a pressure meter configured to measure the pressure of the liquid in the liquid supply line.