Coffee brewing machine

Details Coffee brewing machine Coffee brewing machine

1992-10-28

1993-08-24

Hornsby, Harvey C.

Foods and beverages: apparatus

Beverage

Infusors

99289R, 99297, A47J 3100

Patent

active

052379116

ABSTRACT:
The invention provides a coffee brewing machine, comprising a container for fresh cold water, a boiler for heating the fresh cold water, a brewing chamber adapted to receive coffee powder, a pump for feeding the fresh cold water from the container to the boiler and therefrom into the brewing chamber, a piston fitting into the brewing chamber and being movably mounted such that it can be moved into the brewing chamber to compress the coffee powder contained in the brewing chamber and removed from the brewing chamber, and an electric DC motor for driving the piston into the brewing chamber and for retracting it out of the brewing chamber. In order to provide for a simple connection of the electric motor to the mains voltage, a drop resistor and a rectifier diode are connected in series with the electric motor. The drop resistor simultaneously serves as a heating element for a hotplate on which the coffee cups can be preheated.

REFERENCES:
patent: 4203054 (1980-05-01), Totsu
patent: 4797296 (1989-01-01), Meier et al.
patent: 4858522 (1989-08-01), Castelli
patent: 4934258 (1990-06-01), Versini
patent: 4970948 (1990-11-01), Giannelli
patent: 5134925 (1992-08-01), Bunn et al.

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