Abstract: A decoction device for an extraction apparatus, in particular for preparing espresso, comprises a decoction chamber (7) enclosed by a chamber wall (5) for receiving a quantity of powder therein. The decoction chamber is situated between a first chamber bottom (20) and a second chamber bottom (30). The first chamber bottom (20) is coupled to a linear actuator and is axially movable in the decoction chamber so as to compress the powder to a bed. A drive is provided to impose a relative rotation between one of the chamber bottoms and the chamber wall as the chamber bottoms (20,30) approach each other. The respective chamber bottom (30) is for this purpose rotatable within the chamber wall (5) and the drive is able and configured to impose a rotation thereon during an approach movement of the first chamber bottom (20). A slip coupling (60) is provided in the transmission.

Abstract: A device for preparing a coffee product comprises a preparation chamber (135) which is intended and configured to receive and collect a quantity of ground coffee in a coffee bed (125), and pump means (15) for carrying water under increased pressure to the preparation chamber. The preparation chamber (135) is provided with a water inlet (136) for water at increased temperature and pressure on a first side of the coffee bed (125) and with an outlet (137) on an opposite side beyond the coffee bed (125). The outlet is coupled via a liquid conduit (20) to an outflow (6) at which the coffee product can be taken away. The device is provided with an electronic control system (17) which imposes a preparation cycle each time a product is prepared.

Abstract: A decoction device for an extraction apparatus, in particular for preparing espresso, comprises a decoction chamber (7) enclosed by a chamber wall (5) for receiving a quantity of powder therein. The decoction chamber is situated between a first chamber bottom (20) and a second chamber bottom (30). The first chamber bottom (20) is coupled to a linear actuator and is axially movable in the decoction chamber so as to compress the powder to a bed. A drive is provided to impose a relative rotation between one of the chamber bottoms and the chamber wall as the chamber bottoms (20,30) approach each other. The respective chamber bottom (30) is for this purpose rotatable within the chamber wall (5) and the drive is able and configured to impose a rotation thereon during an approach movement of the first chamber bottom (20). A slip coupling (60) is provided in the transmission.

Abstract: A device for preparing a coffee product comprises a preparation chamber (135) which is intended and configured to receive and collect a quantity of ground coffee in a coffee bed (125), and pump means (15) for carrying water under increased pressure to the preparation chamber. The preparation chamber (135) is provided with a water inlet (136) for water at increased temperature and pressure on a first side of the coffee bed (125) and with an outlet (137) on an opposite side beyond the coffee bed (125). The outlet is coupled via a liquid conduit (20) to an outflow (6) at which the coffee product can be taken away. The device is provided with an electronic control system (17) which imposes a preparation cycle each time a product is prepared.