Magnetic encoder for powered window covering
US6870338B2 · kind B2 · utility
25Cited by
14References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2003 |
| Grant date | Mar 22, 2005 |
| Priority date | — |
| Expiry date | Jun 11, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B80/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A small permanent magnet is affixed to the protruding portion of a rotor of a motor that is coupled to gears in a gear enclosure. The rod of a window covering is coupled to the gears such that when the motor is energized by a user command signal, the window covering moves. At least one pick-up coil is affixed to the receptacle of the gear enclosure, such that when the motor with magnet turns, the pick-up coil senses magnetic pulses that can be used to determine the speed, position, and direction of rotation of the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.