Two and three position over-under window shade
US4813468A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1987 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Sep 8, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/2627
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Two and three position over-under shades having at least three horizontal rails separated by pleated blinds. Single or double lift cords are provided to control the raising and lowering of the blinds. Material for the individual blinds may be any material which exhibits suitable properties and meets the aesthetic requirements of the user, this includes translucent single pleated fabric, honeycomb pleated material providing significant thermal insulation, or even insect screen. A blind may be omitted leaving the rail below suspended by its lift cord and providing an opening without raising the entire shade. The design allows a choice of window coverings to be in place and provides different window coverings while maintaining a uniform appearance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.