Rotary apparatus having improved drive means
US4482097A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 1982 |
| Grant date | Nov 13, 1984 |
| Priority date | — |
| Expiry date | Aug 2, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotary apparatus, such as an ore grinding mill, has a wrap-around drive motor secured thereto for rotating the apparatus about a central axis. The drive motor includes a rotor attached to and surrounding the apparatus and a stator surrounding and spaced from the rotor and coupled to the apparatus by anti-friction or journal bearings. Thus, the rotor can rotate relative to the stator yet the stator is supported by the apparatus and the gap between the rotor and stator is maintained substantially uniform at all circumferential locations along the rotor. The journal bearings include a number of wheels or rollers mounted on an annular carrier for the stator and engaging an annular track on the apparatus. The stator has a pair of legs for coupling the stator to a fixed support to prevent rotation of the stator about the central axis relative to the support yet permit small lateral displacements of the stator with the apparatus relative to the axis support.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.