Electromagnetic clutch-controlled electric blind
US6789597B2 · kind B2 · utility
15Cited by
8References
35Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | May 14, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Jun 9, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S160/17
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An electromagnetic clutch-controlled electric blind is constructed to include a blind body formed of a headrail defining a receiving chamber, a set of slats, and a bottom rail, a power drive, the power drive including a reversible motor and electromagnetic clutch apparatus connectable to the motor, an amplitude modulation set coupled to the motor for rotation with the motor to lift/lower the slats to the desired elevation, a frequency modulation set coupled to the motor through the electromagnetic clutch apparatus and adapted for controlling tilting angle of the slats.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.