Control and suspension system for a covering for architectural openings
US6289964A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1999 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Jun 22, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B9/326
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A control and suspension system for a retractable covering mounted on a rotating element includes an apparatus for mechanically limiting over-extensions of the covering and an apparatus for mechanically limiting over-retractions of the covering. The apparatus for limiting over-retraction includes a threaded shaft and an internal, roll-bar-support wheel treaded on the threaded shaft. An intercepting ledge comprising part of the internal, roll-bar-support wheel, and a stopping ledge comprising part of the threaded shaft. Over retraction of the covering is prohibited when the intercepting ledge impacts the stopping ledge. The apparatus for limiting over-extension includes a roll-bar-end support wheel having a down limit stop pivotally mounted thereto. When the covering material is fully extended, the limit stop rotates away from the roll-bar-end support wheel and impacts a substantially annular channel wall associated with an end cap, thereby preventing further rotation of the roll bar and thus further extension of the covering. The control and suspension system also includes an apparatus to compensate for any undesirable skewing of the covering that might occur. The skew adjustment a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.