Patent ID: 6733413
Filing Date: 2004-05-11
Classification: E06B,F16H

Abstract:
A drive device for manually driving a blind/shutter device equipped with a winding shaft, comprising an epicyclic reduction gearbox between a manual driving means and the winding shaft of the blind, wherein the epicyclic gearbox includes two simple juxtaposed planetary gear trains, sun wheels of which are mechanically linked so as to be driven simultaneously at the same speed and an annulus gear of the first planetary gear train of which, on the input side of the reduction gearbox, is fixed and another annulus gear of which can rotate, and which the device has a reduction ratio less than or equal to 3, wherein planet pinions (a1, a2) of the two gear trains are carried by a common planet carrier constituting the input of the reduction gearbox and wherein the annulus gear (B2) of the second planetary gear train constitutes the output of the reduction gearbox.