A beverage extraction device includes a cylinder having a bottomed cylindrical shape; a piston member configured to move close to and away from a bottom portion of the cylinder, the beverage extraction device being configured to extract a beverage from a beverage raw material and hot water that are fed through an upper surface opening of the cylinder by a movement of the piston member and discharge the extracted beverage through a discharge passage connected to the bottom portion; and a cover member configured to move between a fully opened position and a fully closed position. The cover member includes a scraper portion configured to remove an extraction residue placed on the piston member closing the upper surface opening when the cover member moves from one to another of the fully opened position and the fully closed position.

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.

A coffee brewer contains a brewing unit in which coffee grounds having been poured in are compressed by a plunger driven by an actuator. Heated water flows through the compressed coffee grounds. A control device controls the actuator in accordance with signals of an angle of rotation sensor. The control device first moves the plunger against a stop in an ejection position to calibrate the sensor, then moves the plunger by a predetermined distance in a downwards direction into a pouring-in position. Afterwards the control device moves the plunger by a second distance into the brewing position, a length of the predetermined distance and the second distance corresponds to a number of pulses of the sensor which are stored in the memory. The control device subsequently moves the plunger by a third distance back into the ejection position in which the coffee grounds are removed from the plunger.

A beverage machine that brews beverages from a beverage pod is described. The pod is container with a top surface and a bottom surface connected by a sidewall that form a cylinder. The pod contains whole brewing elements that can be ground into sub-elements by the brewing system for brewing into a beverage. The pod is actuatable between an open state and a closed state by a breaking system of the beverage machine. In the closed state the brewing elements are contained and in the open state the elements are released. The pod includes a failure mechanism on the sidewall that is engineered to fail when the pod is actuated by a breaking mechanism of the beverage machine. When actuated the failure mechanism fails such that the beverage pod can be pulled into a top portion and a bottom portion to release the brewing elements.

A method for making a coffee beverage with a filter-coffee taste uses a coffee machine that has a brewing unit with a brewing chamber and a plunger which is movable in the brewing chamber and is intended for setting a brewing-chamber volume. The brewing chamber is filled with ground coffee and water is fed into the brewing chamber for the purpose of extraction in the course of a brewing process. During at least one brewing phase, the plunger is arranged so that the volume of the brewing chamber is greater than the volume of the ground coffee in a loosely filled state in the brewing chamber after filling with coffee. The brewing process comprises several brewing phases, in which water with different flow rates is made to pass through the ground coffee. The change between the brewing phases is performed by measuring instruments detecting and/or determining a physical variable.

An apparatus to prepare beverages comprises a brewing chamber 3 movable by driving device 5, 6 along a vertical path, a first piston 7 and a second piston 9 movable within the brewing chamber 3, a hopper 25 to feed coffee powder to the brewing chamber and a discharge device 21 to discharge a spent coffee cake; the hopper 25 is pivotally mounted in the apparatus to obtain a desired distribution of coffee powder in the chamber.

The coffee machine (1) comprises a controller, a boiler for heating a flow of infusion water, a movable infusion unit (3) that comprises an open infusion chamber (4) connected to a dispensing line (6) for dispensing the coffee infusion and an ejection piston (9) slidably supported in the infusion chamber (4), a supply line (5) for supplying said flow of infusion water to the infusion unit (3), a closing piston (8) that is engageable for closure of the infusion chamber (4), the controller being programmed to subject the infusion unit (3), prior to execution of the infusion process, to a first course of translational movement for closure of the infusion chamber (4) by the closing piston (8), and to subject the infusion chamber (4) and the ejection piston (9) or only the ejection piston (9), following execution of the infusion process, to a second course of translational movement in the same direction as the first course of translational movement, for compression of the load of spent coffee grounds (33) against the closing piston (8) and drainage of the liquid contained therein.

A coffee machine including a controller, an infusion cylinder that can be loaded with a ground coffee dose, an ejection piston slidably supported inside the infusion cylinder, a closing piston engageable in the infusion cylinder to create a closed infusion chamber for the ground coffee dose, delimited between a lateral wall of the infusion cylinder, the ejection piston and the closing piston. Electrical actuation moves the infusion cylinder between a lower travel limit stop, where the ground coffee dose is loaded, and an upper travel limit stop where the infusion process occurs, an adjuster for positioning the upper travel limit stop based on the size of the loaded ground coffee dose, so that in the position of the upper travel limit stop, the infusion chamber has a volume sufficient to contain the ground coffee dose without compressing it.

A brewing cavity and a coffee brewer including the brewing cavity are provided. The brewing cavity includes a brewing cavity shell and a brewing chamber having a groove with an inner diameter less than that of the brewing chamber. A side wall of the groove has a coffee outlet communicatively connected with an exterior. A bottom portion of the groove is provided with a through hole internally provided with a coffee seal ring. A pressure sealing water outlet element is fixedly mounted on an upper end surface of the groove. A filtering portion for filtering coffee is arranged above the pressure sealing water outlet element. A first sliding hole in the filtering portion, a second sealing sliding hole in the pressure sealing water outlet element and a third sealing sliding hole in the coffee seal ring are internally provided with discharge portion capable of sliding along the through hoe axially.

The present disclosure includes an extraction assembly for use in an automatic espresso brewer. The extraction assembly includes components and methods for controllably extracting espresso beverage from a quantity of brewing substance. The components, assemblies, and methods facilitate improved control and operation of the extraction assembly and improve the reliability of the extraction assembly. The brewing substance is compacted between a pair of opposing pistons. Compacting force is monitored through at least one sensor carried on the extraction assembly to provide a signal to a controller. A predetermined compacting force may be programmed into the system for all brewing cycles or dependent upon the brewing substance used. The pair of pistons operates relative to a brew chamber for use in the espresso extraction process. The pistons provide compacting force and boundaries within the chamber and facilitate removal of a spent brewing substance puck at the end of the brewing cycle. Compacting force is monitored at the start of the brewing process and a predetermined force is required before the brewing process can be started. During the brewing process compacting force can be maintained and controllably adjusted. A variety of sensor methods and locations can be used to detect and monitoring compacting force.