Brushless direct current motor with inverted magnet clip
US4585963A · kind A · utility
21Cited by
9References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1984 |
| Grant date | Apr 29, 1986 |
| Priority date | — |
| Expiry date | Oct 11, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49012
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brushless direct current motor with the rotating magnet cup permanently attached to the spindle hub. After attachment, the combination spindle hub and magnet cup are affixed to the shaft and the resulting subassembly is dynamically balanced. The motor using this balanced subassembly can be assembled with no balancing required after assembly. The motor can also be disassembled for repair and reassembled without disturbing the dynamic balance. The motor includes an air seal at one end thereof and is especially useful for disk drive applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.