Foods and beverages: apparatus – Beverage – Infusors
Patent
1995-09-15
1997-06-10
Alexander, Reginald
Foods and beverages: apparatus
Beverage
Infusors
99297, 99298, 99302P, A47J 3134
Patent
active
056365632
ABSTRACT:
A brewing device for a domestic espresso maker includes a brewing chamber adapted to be filled with coffee grounds. The brewing chamber has on its outlet side a filtering means and on its inlet side a piston entering the brewing chamber along the wall thereof and closing the chamber, so that water arriving from a source of pressure is forced into the brewing chamber. The water subsequently flows out of the brewing chamber at the end close to the filtering means as an espresso beverage. In the path of flow of the water, a safety device responsive to a critical pressure in the pressure system is provided between the source of pressure and the brewing chamber. In the presence of pressures prevailing under normal operating conditions, the outlet orifice is outside the brewing chamber; in the presence of a pressure exceeding a critical value, a displacement of the piston relative to the wall of the brewing chamber occurs, such as to cause the outlet orifice to become part of the brewing chamber.
REFERENCES:
patent: 1774980 (1930-09-01), Lambert
patent: 4763566 (1988-08-01), Paoletti
patent: 4796521 (1989-01-01), Grossi et al.
patent: 4797296 (1989-01-01), Meier et al.
patent: 5255594 (1993-10-01), Grossi
Klawuhn Manfred
Oppermann Gunter
Alexander Reginald
Braun Aktiengesellschaft
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