Apparatus for maintaining an air gap in a toroidal linear motor
US5033588A · kind A · utility
17Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1990 |
| Grant date | Jul 23, 1991 |
| Priority date | — |
| Expiry date | Feb 26, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/1732
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus for maintaining an air gap between a stationary and a moving element of a toroidal linear motor which provides motive force to an elevator, comprises; a plurality of rollers mounted upon the moving element, and a means for biasing the rollers towards a central axis of the stationary element, and for cooperating with the rollers to maintain the air gap when power to the motor is shut off or vibration or other forces would tend to lessen the gap below a predetermined minimum. The rollers are arranged angularly about the stationary element and rotate due to the relative rotation of the moving and stationary elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.