US 11,719,041 B2
Drive system driving a screen, and apparatus comprising such a system
Alexandre Chat, Brenthonne (FR)
Assigned to SOMFY ACTIVITES SA, Cluses (FR)
Appl. No. 17/259,068
Filed by SOMFY ACTIVITES SA, Cluses (FR)
PCT Filed Jul. 10, 2019, PCT No. PCT/EP2019/068502
§ 371(c)(1), (2) Date Jan. 8, 2021,
PCT Pub. No. WO2020/011836, PCT Pub. Date Jan. 16, 2020.
Claims priority of application No. 1856377 (FR), filed on Jul. 11, 2018.
Prior Publication US 2021/0140233 A1, May 13, 2021
Int. Cl. E06B 9/60 (2006.01); E06B 9/42 (2006.01); E06B 9/72 (2006.01)
CPC E06B 9/60 (2013.01) [E06B 9/42 (2013.01); E06B 9/72 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A drive system for driving a screen, comprising:
an actuator configured to drive in rotation a winding shaft associated with the screen; and
a compensation spring,
wherein the compensation spring comprises
a first series of turns having a first spacing, and
at least one second series of turns having a second spacing,
the second spacing being larger than the first spacing,
and wherein the compensation spring comprises
a first end that is fixed on an attachment part mounted on a tubular casing of the actuator, and
a second end that is fixed to one of an output shaft of the actuator or a drive wheel driven by the output shaft.