公开(公告)号：US11719041B2

公开(公告)日：2023-08-08

申请号：US17259068

申请日：2019-07-10

Applicant: SOMFY ACTIVITES SA

Inventor： Alexandre Chat

IPC: E06B9/60 ,  E06B9/42 ,  E06B9/72

CPC classification number: E06B9/60 ,  E06B9/42 ,  E06B9/72

Abstract: Disclosed is a drive system for driving a screen, that includes an actuator designed to drive in rotation a winding shaft associated with the screen, and a compensation spring. The compensation spring includes a first series of tums having a first spacing; and at least one second series of turns having a second spacing, with a value that is greater than the value of the first spacing.