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:
Apr. 22, 1997
Filed:
Jul. 30, 1996
Hans-Peter Frei, Oetwil am See, CH;
Eugster/Frismag AG, Romanshorn, CH;
Abstract
A brewing head of an espresso maker includes a housing, and a lower brewing head section fixedly attached to the housing. The lower brewing head section includes a pressure sealed brewing chamber, and a lifting piston forming a floor of the brewing chamber. The lifting piston has apertures therethrough. A water inlet is located beneath the floor of the brewing chamber. An apparatus for moving the lifting piston is provided. The brewing head further includes an upper brewing head section movable relative to the lower brewing head section. The upper brewing head section includes an upper brewing head housing, and a fill shaft. The fill shaft is in communication with the brewing chamber when the upper brewing head section is moved to a fill position. The upper brewing head section further includes a brewing piston positioned over the brewing chamber when the upper brewing head section is moved to a brewing position. The brewing piston includes a coffee outlet in communication with the brewing chamber when the upper brewing head section is in the brewing position. The upper brewing head section further includes an apparatus for plunging the brewing piston into the brewing chamber when the upper brewing head section is in the brewing position. Moreover, the upper brewing head section includes a clearing element immovably secured to the upper brewing head housing for clearing the brewing chamber of used ground espresso when the upper brewing head section is moved to a clearing position.