Cordless shade lift system and headrail arrangement
US9732555B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 2016 |
| Grant date | Aug 15, 2017 |
| Priority date | — |
| Expiry date | Feb 2, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/3225
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A covering for an architectural opening including a first rail, a second rail moveable relative to the first rail, a third rail moveable relative to the first rail, and a lift assembly coupled to the first rail. The lift assembly includes a first drum rotatable about a first axis, a second drum rotatable about a second axis; a first lift cord coupled between the first drum and the second rail, and a second lift cord coupled between the second drum and the third rail. The first drum is offset from the second drum, and a portion of the first drum overlaps a portion of the second drum along a third axis that is perpendicular to the first axis and the second axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.