Brewing unit for automatic coffee machines

A - Human Necessities – 47 – J

Patent

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Details

A47J 31/40 (2006.01)

Patent

CA 2655191

The present invention relates to a brewing unit (1) for a coffee machine. The brewing unit comprises a brewing chamber (2) in which a dose of coffee powder can be lodged, an inlet for supplying water to the chamber for preparing a coffee beverage, a first piston (5) providing a moveable wall for adjusting the chamber internal volume, which wall has an outlet (12) ~ for delivering the coffee beverage out from the chamber, and a valve assembly (13) for opening/closing said delivery outlet. Advantageously a second piston (6) is provided which moves the first piston and supports the valve assembly. The second piston is also moveable with respect to the first piston, for actuating the valve assembly.

La présente invention concerne une unité d'infusion pour une machine à café. L'unité d'infusion comporte une chambre d'infusion dans laquelle une dose de café moulu peut être logée, une entrée permettant d'alimenter de l'eau dans la chambre pour la préparation d'une boisson à base de café, un premier piston mettant en AEuvre une paroi mobile permettant d'ajuster le volume interne de la chambre, ladite paroi ayant une sortie pour acheminer la boisson à base de café hors de la chambre, et un ensemble valve permettant d'ouvrir et de fermer ladite sortie d'acheminement. De manière avantageuse, un deuxième piston est mis en AEuvre. Ce piston déplace le premier piston et supporte l'ensemble valve. Le deuxième piston est également mobile par rapport au premier piston pour actionner l'ensemble valve.

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