Drive device for manually driving a blind comprising an epicyclic reduction gearbox
US6733413B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2002 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Jun 18, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2001/2881
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Drive device for manually driving a blind, roller shutter or the like, comprising an epicyclic reduction gearbox consisting of the juxtaposition of two simple planetary gear trains of type I (A1, B1, a1,/A2, B2, a2), the sun wheels (A1, A2) of which are mechanically linked so as to be driven simultaneously at the same speed and the annulus gear (B1) of the first planetary gear train of which, on the input side of the reduction gearbox, is fixed and the other annulus gear (B2) of which can rotate. The reduction ratio is less than or equal to 3. This drive device makes it possible to obtain a low reduction ratio with a small diameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.