Patent ID: 8991304
Filing Date: 2015-03-31
Classification: A47J,Y10T

Abstract:
1. An espresso coffee machine, in which one kind of coffee beverage selected from at least two kinds of coffee beverages may be produced, with a brewing unit comprising a brewing chamber and a first spring-loaded pressure valve which blocks a fluid connection between the brewing chamber and a coffee beverage outlet and which opens when a brewing chamber pressure exceeds a first predetermined value, wherein an atmospheric coffee beverage bypass channel is in fluid connection in parallel to the first pressure valve and may be locked depending on a kind of coffee beverage selected between the brewing chamber and the coffee beverage outlet, a brewing plunger is movably arranged in the brewing chamber, the coffee beverage bypass channel and the first pressure valve are arranged in the brewing plunger, a first valve plunger movable in the brewing plunger may be adjusted from outside of the brewing chamber depending on the kind of coffee beverage selected, the first valve plunger is in fluid connection with the coffee beverage bypass channel and with the coffee beverage outlet such that, in a first valve position, it blocks the coffee beverage bypass channel from the beverage outlet and, in a second valve position, it connects the coffee beverage bypass channel with the coffee beverage outlet, a second spring-loaded pressure valve in the brewing plunger that is in fluid connection with the brewing chamber and with the coffee beverage outlet opens when the brewing chamber pressure exceeds a second predetermined value that is lower than the first predetermined value, a second valve plunger movable in the brewing plunger may be adjusted from outside of the brewing chamber depending on the kind of coffee beverage, and the second valve plunger is in fluid connection with the second pressure valve and with the coffee beverage outlet such that, in a first valve position, it blocks the second pressure valve from connecting to the coffee beverage outlet and, in a second valve position, it connects the second pressure valve to the coffee beverage outlet.