Patent ID: 8802174
Filing Date: 2014-08-12
Classification: A47J

Abstract:
1. A machine for preparing coffee infusions by means of a liquid under pressure, the machine being associated with a pump assembly arranged to raise the pressure of the liquid outgoing from the pump assembly up to a preset pressure value, said machine comprising: one or more dispensing units connected to the pump assembly, each said dispensing unit being arranged to dispense the coffee infusion; one or more pressure managing devices, each said pressure managing device being connected to a certain dispensing unit and including a first duct and at least one second duct that are connected in parallel, have a common outlet and are arranged to supply the dispensing unit with liquid under pressure, the liquid pressure being different in each duct, wherein said first duct is arranged between said pump assembly and said dispensing unit and comprises a valve device electronically controlled by a control unit in order to dynamically control the pressure of the liquid supplied to the dispensing unit by closing/opening said valve; wherein said at least one second duct comprises a second valve device electronically controlled by the control unit in order to dynamically control the pressure of the liquid supplied to the dispensing unit by closing/opening said second valve.