Braun Aktiengesellschaft

Walter Hufnagl

Roland Muller

Manfred Klawuhn

Gerhard Schafer

Andreas Peter

Wolfgang Franke

Stefan Schamberg

Brewing device for a household expresso coffee machine

Coffee maker for the preheating and keeping warm of cups

A coffee maker having a heating device for heating water to the temperature necessary for producing a coffee drink. The coffee maker is equipped with an electrically powered pump for the delivery of water, with a bore being provided in the pump casing. Within the bore, a working piston reciprocates, its stroke determining a working chamber. The coffee maker is provided with a suction valve and a discharge valve, each including a valve closure body spring-loaded in the closing direction. The suction valve is opened by pressure below atmospheric and the discharge valve by pressure above atmospheric in the working chamber. The preparation of the coffee drink is accomplished by the pump drawing water through the suction valve and delivering it under pressure through the discharge valve to a brewing chamber adapted to be filled with coffee grinds from which it escapes following extraction. The pump draws hot water which is already preheated by the heating device to the temperature suitable for preparing the brew, with the suction valve being configured as a poppet valve. As a result, brewing water heated to a practically constant temperature is supplied to the material, irrespective of the firmness to which the coffee grinds are compressed and the fineness of the grind, and also irrespective of the quantity of coffee or espresso to be made, with the hot water being pumped to the brewing chamber without an appreciable drop in pump capacity occurring.

Coffee maker

Espresso coffee machine

An espresso coffee making system includes an unpressurized boiler vessel with an electric heating element arranged outside the boiler vessel for heating water in the boiler vessel for delivery to a perforated filter holder of the espresso coffee maker. A tube is provided between the electric heating element and the boiler vessel that is in thermal contact with both the heating element and the boiler vessel. A valve allows water from the boiler vessel to be recirculated by a pump through the tube to generate steam, without overheating the water contained in the boiler vessel.

Brewed beverage maker with unpressurized boiler vessel steam generator

The invention is directed to an electric food processing apparatus including a working vessel 1 and a cutting and blending tool 3 which is adapted to rotate therein near the vessel bottom and is provided with a central hub 4 adapted to be coupled to a drive shaft and connecting two blades 10, 11 positioned in different planes of rotation. The curved leading edges of the blades 10, 11 form the cutting edges 14, 15. The cutting edges 14, 15 of the blades 10, 11 are of different curvatures.

Electric food processing apparatus

Growing community of inventors

Sulzbach, Germany

Walter Hufnagl