Abstract: A valve device suitable to selectively obstruct a flexible tube, includes a first body and a second body operatively associated with each other, which are mobile with respect to each other along a sliding axis, thus configuring an open operating position and a closed operating position and thus defining a passage gap configured to be passed through by the flexible tube. The invention also concerns a machine for preparing beverages which includes a valve device and a corresponding functioning method.

Abstract: A coffee extraction method with a coffee machine comprising an infusion circuit comprising a supply pump, an electric heater and an infusion unit having an infusion chamber where a dose of coffee powder can be positioned, connected in sequence, wherein the machine stores a plurality of selectable extraction cycles each including in sequence an infusion circuit heat regulation step, a step of introducing said dose into said infusion chamber, and a step of extracting coffee having an initial coffee extraction temperature value, and after acquiring a selection of a coffee extraction cycle, compares the value of a temperature along the infusion circuit with the initial extraction temperature value of the selected extraction cycle, and performs the heat regulation step by activating the supply pump to generate a heat regulation water flow until the detected temperature value achieves the initial extraction temperature value of the selected extraction cycle.

Abstract: A machine for preparing beverages comprises a front wall, a rest base for containers positioned in front of the front wall and a temperature detection probe immersible in a comestible liquid contained in a container positioned on the rest base. The front wall has a beverage dispenser and a steam dispenser positioned above the rest base of the containers and supports a first antenna. The temperature probe comprises a second antenna interacting with the first antenna for wireless transmission of the temperature detected of the liquid in the container.

Abstract: A valve device includes an entry aperture and an exit aperture for a fluid, a chamber which puts the entry and exit apertures in selective communication, a housing compartment, a piston disposed in the compartment, which is mobile between a closing position in which it prevents the transit of the fluid and an opening position in which it allows the passage of the fluid, and elastic return means associated with the piston A machine for preparing beverages includes at least one said valve device.

Abstract: A valve device suitable to selectively obstruct a flexible tube, includes a first body and a second body operatively associated with each other, which are mobile with respect to each other along a sliding axis, thus configuring an open operating position and a closed operating position and thus defining a passage gap configured to be passed through by the flexible tube. The invention also concerns a machine for preparing beverages which includes a valve device and a corresponding functioning method.

Abstract: An automatic machine for preparing coffee beverages includes a brewing unit provided with a brewing chamber connected to a feed circuit for the water by means of an entry aperture and to an exit circuit for the beverage by means of an exit aperture. The machine also includes a valve unit, connected to the exit circuit and configured to supply a first high-pressure exit path and a second low-pressure exit path for the beverage. The invention also concerns a method to prepare a coffee beverage.

Abstract: A brewing unit for an automatic machine to make coffee beverages includes a brewing chamber closed at the lower part by a first piston and at the upper part, on the opposite side, by a second piston, a first inlet duct for the heated water, and a first outlet duct for the beverage, communicating respectively with an inlet side and with an outlet side of the brewing chamber, and a filtering element disposed in the brewing chamber.

Abstract: The loose product dispenser has a container and a sensor with optical barrier for detecting the presence of loose product in the container, the sensor having a transmitter of a light beam, configured to generate the optical barrier between an entry point and an exit point of the light beam from the container, and a receiver of the light beam, the sensor further has an electronic board on which both the receiver and the transmitter are installed, and a light guide configured and arranged to transmit to the reciever the light beam collected from the exit point.

Abstract: An automatic machine for preparing beverages, in particular American coffee, including a unit to feed the coffee powder, a mobile infusion unit having an infusion cylinder which delimits an infusion chamber, and a hydraulic circuit configured to heat the water for the infusion and feed it to the infusion chamber, where the infusion unit has an expulsion piston slidable inside the infusion cylinder and delimiting at the lower part the infusion chamber, and a valve device provided with a valve body and a closing piston which can engage with the infusion cylinder in order to close the infusion chamber.