Single control system for operating top-down-bottom-up shades
US5791390A · kind A · utility
62Cited by
7References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 6, 1997 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | Feb 6, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/2627
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A lift system for top-down, bottom-up window shades operated by a single control is provided. The preferred embodiment of the invention is compatible with, but not limited to, clutch operated shades whose cords are wound onto a shaft within the headrail. It will work with any shade that presently has top-down-bottom-up capability, using any method of lift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.