Two-speed reducing mechanism for controlling closure devices with adjustable luminosity, of the type such as blinds with orientable slats and the like
US4848433A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1988 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Apr 13, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B9/322
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A two-speed reducing mechanism for controlling the adjustment of a closure such as a blind having adjustable slats which includes a drive input shaft or wheel which is meshed with a planetary ger system supported by an output drive ring which itself is oriented within a rotatable bushing which may be selectively secured from rotation by a braking device. The planetary gear assembly is also meshed with the bushing so that when the bushing is rotatable, the closure member may be quickly adjusted in a one-to-one drive relationship with respect to the input shaft, however, when the bushing is prevented from rotating, the elements of the planetary gear assembly will rotate upon themselves causing a speed reduction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.