| 20090052712 | Stabilized Deployable-Retractable System, Principally for an Acoustic Loudspeaker System - A deployable-retractable assembly comprising a base, a mobile sound generation system which is elongated along a reference direction, intended to be used with a projection screen and intended to be moved between a retracted position and a deployed position along a generally vertical translation direction transverse to the reference direction, and a movement control system to drive the movement of the mobile sound generation system relative to the base along this translation direction, wherein the movement control system comprises a roll-up retention device which has a roll-up axis transverse to the translation direction and which is stretched between the base and the mobile sound generation system, and a self-guided stabilization mechanical device linked to the base and to the mobile sound generation system, deformable within a plane at least approximately parallel to the translation direction and the roll-up axis and also significantly stiff transversally to this plane, with at least one of these devices equipped with a drive mechanism. | 02-26-2009 |
