Espresso coffee machine
US5280747A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1992 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Nov 20, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47J31/469
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An espresso coffee machine has a vertically movable snout that supplies hot water under pressure of a pump (13), to coffee (8) held in a filter (7) on a stationary support (9). The snout (10) which penetrates inside the filter (7), is mounted on the first part (22) of a hydraulic jack (21) actuated by the pressurized water supplied by the pump (13). The second part (88) of the jack is adapted to be moved against the action of an antagonistic spring (98) in order to permit the optimum deployment of the jack (21) when the snout (10) is in contact with the ground coffee (8) in the filter (7). This construction is useful for limiting the mechanical stresses on the component parts of the jack, and the pressure exerted by the snout on the ground coffee.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.