Precision coffee grinder
US4605175A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1984 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Sep 10, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47J42/46
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A coffee grinder grinds a predetermined amount of roasted coffee beans based upon the weight of the beans. The beans fall from a hopper into a grinding head which grinds the beans in a two-stage process. The first stage includes a cracking cutter, consisting of a cone cutter and a reel cutter, which reduces the beans to an initial particle size of approximately 1/16 of an inch in cross-section. The particles are then progressed by the grinding head, for the second stage of fine grinding, to an adjustable micro grinder consisting of two opposing rings having micro teeth on their inwardly facing surfaces. The cutters and grinder rings are mounted on thermally conductive metal hubs and a fan draws air around and behind the cutting teeth to cool them and avoid heating the coffee particles during the grinding process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.