Cordless blinds
US7143802B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2003 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Jun 3, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/2627
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A window blind assembly includes a headrail having a longitudinal axis extending between first and second ends thereof, a first tube rotatably mounted between the first and second ends of the headrail and a second tube rotatably mounted between the first tube and the second end of the headrail. The assembly also has a bottom rail suspended below the headrail, an intermediate rail suspended below the headrail and positioned between the headrail and the bottom rail, and a window covering material extending between the intermediate rail and the headrail, the window covering material having an upper end attached to the intermediate rail and a lower end attached to the bottom rail. The assembly further includes a first lift cord having an upper end secured to the first tube and a lower end secured to the intermediate rail, and a second lift cord having an upper end secured to the second tube and a lower end secured to the bottom rail, whereby the intermediate rail and the bottom rail are movable independently of one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.