Abstract: A brewing means (1) for a coffee machine with a brewing chamber (3) is described, which is disposed in a housing (2) provided with an opening (9) on a front side. The opening (9) can be closed by means of a closing element (10) sealed against the opening. A hot water line (11) is furthermore provided, which supplies hot brewing water to the brewing chamber (3) under pressure and supports at the same time the sealing of the opening (9). In order to design such a brewing means (1) in such fashion that the service life of the seal (21) can be increased, it is suggested that the seal (21) comprises a flexible membrane disposed between a sealing chamber (22) connected to the hot water line (11) and a sealing seat (19), which can be arched and pressed against the sealing seat by means of the pressure.

Abstract: A coffee machine with a brewing apparatus is described which contains a brewing vessel disposed removably and insertably on a support by detachable fasteners. A piston driven by a motor via a piston rod and a gear pin is movable within the interior of the brewing vessel. In order to facilitate the removal and insertion of the brewing vessel in a given direction for cleaning purposes and to be able to also exchange the brewing vessel, if required, the piston is connected to the gear pin via a separable coupling, which can be separated or coupled by removal or insertion movement of the brewing vessel in the given direction so that the brewing vessel can be removed and inserted together with the piston as a unit.

Abstract: A device for preparing hot drinks is disclosed having a liquid-storage vessel 3, an electric heating element 14 arranged therein, a current supply circuit 17 and a collecting vessel 1 for the prepared drink. This device can be used very advantageously, particularly in vehicles. It is characterized in that the storage vessel 3 is designed as a unit separate from the current supply circuit 17 and closed by valve 10-13 which opens irreversibly at a predetermined pressure inside the storage vessel 3, and is provided with contacts 16 for the supply of electrical current which are connected to the heating element 14 via an electric line 15 which is interrupted when the valve 10-13 is opened. The storage vessel 3 is insertable into the collecting vessel 1 in such a way that in an operative position of the storage vessel 3, a collecting space of the collecting vessel 1 is situated essentially below the storage vessel 3.

Abstract: The single driven part of the apparatus is an axially movable scalding cylinder, in which a piston is located which is free to move in the axial direction. This piston is positioned by a guide bush or moved with the scalding cylinder. A supporting block comprises, furthermore, an abutment for the disk of the piston. A second piston is arranged stationary or may be moved also axially against the force of a spring against a further supporting block. By the movement of the scalding cylinder ground coffee which has been inserted between the pistons is compressed and drinkable coffee is produced by feeding hot water thereto.

Abstract: An automatic machine for making coffee or a similar beverage includes an infusion chamber at atmospheric pressure and adapted to accommodate a mixture of liquid such as hot water and a material serving as the base of the beverage. The infusion chamber has at the bottom thereof a surface permeable to fluids and impermeable to the material. An extraction chamber is positioned below the bottom of the infusion chamber and communicates therewith through the surface. A first control mechanism is positioned within the extraction chamber for moving upwardly therein to force air through the surface into the mixture in the infusion chamber and for moving downwardly within the extraction chamber to extract beverage from the infusion chamber through the surface into the extraction chamber. A second control mechanism is provided within the extraction chamber for forcing beverage within the extraction chamber therefrom under pressure to a dispensing area.

Abstract: The automatic coffee-making machine according to the invention comprises a filter carrier having on its base a movable filter for filtering the coffee infusion, there being introducible into the carrier in sealing-tight manner a piston having means for delivering pressurized hot water supplied by a metering unit, the piston being operated for its movements of descent, introduction into the filter carrier element, compression of the coffee powder, raising and lateral rotation by a rod having resilient piston-pulling means and connected to a rotating disc actuated by a geared motor, means being provided to support and guide the piston in its movement, the latter means providing an irreversible transmission of the movement from the motor to the piston, automatic means being provided to expel the spent coffee powder and to supply fresh powder to the filter carrier.

Abstract: Apparatus and method of removing desirable constituents from an infusible material by infusion extraction, where a piston operating in a first chamber draws a solvent into the first chamber where it may be heated, and then moves the heated solvent into a second chamber containing the infusible material, and where infusion extraction takes place. The piston then moves the solvent containing the extract through a filter into the first chamber, leaving the extraction residue in the second chamber.

Abstract: This invention relates to an infusion filter, in particular for use in coffee percolators, which includes a first rigid disc having an open space therein and a second rigid disc having an open space therein. The infusion filter includes a filter element having an inclined edge and a circular part having an open space therein. The filter element and the circular part are disposed between the first and second discs. The inclined edge of the filter element abuts the inclined edge of the circular part. The first and second rigid disc are molded such that the inclined edge of the filter element and the inclined edge of the circular part extend beyond the discs.

Abstract: A coffee machine comprises a boiling chamber, two pistons adjustable independently of each other and adapted to be pushed into the boiling chamber from opposite sides and defining between them a boiling space to hold and boil a predetermined quantity of powdered coffee, a source of boiling water having a through-flow heater and a boiling water pressure generator, and a hydraulic actuating device for the pistons having a pressurized medium circuit including a pressurized medium pump. The boiling water pressure generator is constituted by a media converter, of which one side is incorporated into the water supply to the boiling chamber while its other side is connectible to the pressurized medium pump.

Abstract: Apparatus for preparing a beverage, such as coffee, by extraction of soluble matter from a solid flavoring material into a liquid, in which a jug in the form of a thick walled vessel supported in a frame, acts as a cylinder, and a piston in the form of a capsule containing a flavoring material such as coffee, is arranged to rotate as it is moved axially within the cylinder. The capsule has liquid permeable membranes in axially opposed regions to allow liquid to be forced through the capsule to extract the flavor from the material within it without any of this material being able to escape. The capsule is detachable from the piston for refill or replacement.

Abstract: A container in which a beverage may be brewed from a ground or powdered substance comprises a sealing piston having surfaces of different sizes upon which hot water impinges during the brewing operation, thus creating a pressure differential which ensures proper sealing between the stationary body and the movable head of the container.

Abstract: The invention is directed to an apparatus for brewing a beverage such as coffee or tea. A disposable disc-shaped receptacle contains a predetermined quantity of solid beverage material. The flat lower surface of the receptacle contains a plurality of perforations permitting a flow of hot water into the receptacle for brewing the beverage material. The upper portion of the receptacle is a concave flexible membrane. An actuating rod or stick is attached to the membrane for manually flexing the membrane up and down during brewing. The user places the receptacle into a cup of hot water and using the stick, manually flexes the membrane up and down inducing successive positive and negative pressure variations inside the receptacle. These pressure variations suck and expel hot water through the perforations and thoroughly circulate the water inside the receptacle and throughout the beverage material for brewing.