Electric motor-driven coffee mill
US4101082A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 1977 |
| Grant date | Jul 18, 1978 |
| Priority date | — |
| Expiry date | May 2, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47J42/26
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An electric motor-driven coffee mill having a housing, a circular grinding cup obliquely arranged in the housing, a beater blade rotatably supported above the bottom of the cup, and below the bottom of the cup, a salient-pole motor with an asymmetrically arranged field coil having an inclined axis that the field coil extends on one side beyond the projection of the cup perpendicular to inclined plane of the oblique cup, and the contours of the motor lie inside a cylinder formed by the projection of the cup extending down vertically from the inclined plane of the oblique cup. Other features relate to the disposition of the motor in a plastic frame, a flat commutator and carbon brushes held by leaf springs, and double insulation around the shaft to shield it from its rotor. More efficient, economical coffee mills with greater electrical safety are thereby provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.