Magnetic brake for powered window covering
US6967418B2 · kind B2 · utility
5Cited by
21References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2004 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | Jun 7, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K49/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Two braking magnets are attached to the housing of a motor of a motorized component such as a window covering, with one magnet north face down and the other magnet south face down. With this structure the motor is braked from turning under the weight of the window covering when deenergized, while during operation the average null value of the braking field results in minimal drag on the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.