Brewing head of an espresso maker
US5622099A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1996 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Jul 30, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47J31/3671
- WIPO fieldFurniture, games
- WIPO sectorOther fields
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 …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.