Elevator with linear motor drive assembly
US5235145A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1992 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Jan 13, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K41/025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A linear motor drive assembly having a first primary and a second primary, with a plurality of highly conductive sheets therebetween is provided. The primaries are fixed to a center support extending lengthwise between the two primaries. In a first embodiment, a pair of highly conductive sheets is arranged between the two primaries, edge to edge, in the same plane. A gap, wide enough to permit the center support to pass through freely, separates the sheets. In a second embodiment, a secondary comprising two halves is also positioned between the two primaries. The two halves are arranged edge to edge, in the same plane, separated by a gap wide enough to permit the center support to pass through freely. Sheets of highly conductive material are fixed to the faces of the secondary halves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.