Mechanism for untangling window cords
US8025089B2 · kind B2 · utility
5Cited by
35References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2006 |
| Grant date | Sep 27, 2011 |
| Priority date | — |
| Expiry date | Jan 4, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/3227
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A lifting system for a window covering has a movable shaft disposed within a cradle that is held within a head rail. The movable shaft has an end portion and a lift cord wrapping portion. A lift cord is connected to the movable shaft. A transition member is disposed between the end portion and the lift cord wrapping portion. The transition member acts as a ramp to facilitate migration of the lift cord to the lift cord wrapping portion once bird nesting has occurred.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.