Window system covering and operating system
US10626667B2 · kind B2 · utility
7Cited by
107References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 13, 2017 |
| Grant date | Apr 21, 2020 |
| Priority date | — |
| Expiry date | Jan 26, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/3225
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A window covering includes a head rail that supports a panel by lift cords such that one end of the panel may be raised and lowered relative to the head rail. An operating system controls movement of the panel and includes spools coupled to the lift cords such that rotation of the spools retracts and extends the lift cords. A shaft is connected to a spool of the lift spool assembly and to a brake and a spring motor. The spring motor applies a motor force to the shaft and the brake applies a brake force to the shaft such that the forces generated by the spring motor and brake hold the panel in the desired position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.