Filter for rapid extraction of the aromatic substances of a product by a liquid under pressure, and an apparatus equipped with a filter of this type
US5326472A · kind A · utility
6Cited by
6References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 18, 1992 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | May 18, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47J31/0663
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
In an apparatus such as an electric coffee-maker, a filter (5) is placed at the bottom of a vessel (3) containing the product to be treated such as ground coffee. Resilient tongues (18) cut in the filter are disposed at uniform intervals about the center so as to form normally-closed orifices (17). When a predetermined pressure of liquid such as hot water is attained within the vessel, the orifices are freed to a sufficient extent to permit filtration of the liquid which has been in contact with the product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.