COFFEE BREWING APPARATUS

• Main Authors: FLICK, Jean-Marc, BLUNIER, Jean-Daniel, POLSTER, Johannes, MARANDET, Carine
• Format: Patent
• Language: English
• Published: 31.10.2024
• Subjects: APPARATUS FOR MAKING BEVERAGES; COFFEE MILLS; DOMESTIC ARTICLES OR APPLIANCES; FURNITURE; HUMAN NECESSITIES; KITCHEN EQUIPMENT; SPICE MILLS; SUCTION CLEANERS IN GENERAL

The invention concerns a full automatic coffee machine (100) comprising : - a brewing chamber (1), an upper piston (2), a lower piston (3) movable inside said brewing chamber (1), wherein the brewing chamber and/or the upper piston are relatively movable between a first closed position configured for compacting coffee during brewing and the second closed position is configured for not compacting coffee during brewing, - a pressurized hot water fluid system comprising at least a water supply (101), a water heating device (104) and a water pump (102) wherein said system is connected to the water inlet (13) of the coffee extraction unit, wherein the fluid supply system comprises a pressure bypass valve (107) downstream the water pump and wherein the predetermined threshold pressure of the fluid dispensed by said pressure bypass valve is adjustable, and wherein the full automatic coffee machine comprises a control system configured : - to move the brewing chamber and/or the upper piston to the first closed position or to the second position for brewing coffee powder, and - to adjust the predetermined threshold pressure of the fluid dispensed by the pressure bypass valve to a first predetermined threshold pressure, respectively to a second predetermined threshold pressure, when the brewing chamber and/or the upper piston is moved to the first closed position, respectively to the second position.