The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 10, 1997
Filed:
Sep. 15, 1995
Gunter Oppermann, Dietzenbach, DE;
Manfred Klawuhn, Frankfurt am Main, DE;
Braun Aktiengesellschaft, Kronberg, DE;
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.