Asymmetric drive motor for a barrier operator or the like
US6774594B2 · kind B2 · utility
2Cited by
10References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2003 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Feb 24, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2400/31
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An asymmetrical drive motor and apparatus with the asymmetric drive motor driving a barrier. The asymmetric drive motor drives the barrier at different drive powers according to direction, time of travel, safety requirements or speed. The drive power is controlled by electrically changing the capacitance value for a permanent split capacitor motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.