Abstract: The motorized shutter, blind or sun-protection device comprises at least one roll-up element (2; 20), one end of which is kinematically linked to a roll-up element drive roller (1) and the other end of which is attached to pulling strands (3, 4; 15, 16; 22, 23) kinematically linked to a strand drive roller (1; 17, 18; 24, 25), at least one strand return roller (6; 19), and an elastic means (7; 29) keeping the roll-up element and the strands tensioned. It constitutes a balanced system.

Abstract: The device, inserted between a motor (9) and a load (11), allows the load (11) to be immobilized when power is not applied to the motor (9) and allows mechanical torque to be transmitted when power is applied to the motor (9). Such a device is produced by virtue of a juxtaposition of brake disks rotatably connected alternately to the drive shaft (8) and to a casing (10) containing the motor (9) by sliding connections, the end disks (1, 3) of the juxtaposition being rotatably connected on the drive shaft (8) and by virtue of means (4, 5) collaborating to separate these disks and transmit the mechanical torque. The architecture of the device allows the string of dimensions associated with the functional clearance between the means (4, 5) to be reduced and allows the force exerted by the spring (6) on the disk (1) to be reacted by the bearing.

Abstract: The device, inserted between a motor (9) and a load (11), allows the load (11) to be immobilized when power is not applied to the motor (9) and allows mechanical torque to be transmitted when power is applied to the motor (9). Such a device is produced by virtue of a juxtaposition of brake disks connected alternately to the drive shaft (8) by pivoting connections and to a casing (10) containing the motor (9) by sliding connections, the end disks (1, 3) of the juxtaposition being in pivoting connection on the drive shaft (8) and by virtue of means (4, 5) collaborating to separate these disks and transmit the mechanical torque. The architecture of the device allows the string of dimensions associated with the functional clearance between the means (4, 5) to be reduced and allows the force exerted by the spring (6) on the disk (1) to be reacted by the bearing.

Abstract: Traveling-wave piezoelectric motor comprising at least one stator (1, 2) consisting of an annular body with which are associated two groups of piezoelectric elements (3, 4) in the form of rods in permanent contact with the stator and with a connector (7) for their excitation, and a rotor (12, 13). The rods (3, 4) are housed in a drum (5, 6) made of an insulating material whose holes have a constriction (24) for holding the rods.