A motor drive unit for driving a motor of a motorized window treatment may comprise software-based and hardware-based implementations of a process for detecting and resolving a stall condition in the motor, where the hardware-based implementation is configured to reduce power delivered to the motor if the software-based implementation has not first reduced the power to the motor. A control circuit may detect a stall condition of the motor, and reduce the power delivered to the motor after a first period of time from first detecting the stall condition. The motor drive unit may comprise a stall prevention circuit configured to reduce the power delivered to the motor after a second period of time (e.g., longer than the first period of time) from determining that a rotational sensing circuit is not generating a sensor signal while the control circuit is generating a drive signal to rotate the motor.

A motor drive unit for driving a motor of a motorized window treatment may comprise software-based and hardware-based implementations of a process for detecting and resolving a stall condition in the motor, where the hardware-based implementation is configured to reduce power delivered to the motor if the software-based implementation has not first reduced the power to the motor. A control circuit may detect a stall condition of the motor, and reduce the power delivered to the motor after a first period of time from first detecting the stall condition. The motor drive unit may comprise a stall prevention circuit configured to reduce the power delivered to the motor after a second period of time (e.g., longer than the first period of time) from determining that a rotational sensing circuit is not generating a sensor signal while the control circuit is generating a drive signal to rotate the motor.

Present disclosure relates to an adjustable roller shade. Adjustable roller shade includes: roller shade fabric winding shaft, weight, movable pulley, loop traction rope, a first and a second winders, and a first and a second tensioning wheels. Roller shade fabric is wound on roller shade fabric winding shaft forming upper edge of adjustable roller shade. Weight is attached to bottom of roller shade fabric forming lower edge of adjustable roller shade. Movable pulley is fixedly attached to one end of the roller shade fabric winding shaft. Loop traction rope is wound around the movable pulley, the first and second winders, and the first and second tensioning wheels. A driving motor drives first winder to rotate in different combination of directions to raise or lower upper edge and lower edge of adjustable roller shade, resulting adjustable roller shade to be opened or closed freely from both upper and lower edges.

An electromechanical actuator (11) for a closure, obscuring or solar protection installation (6) includes a motor assembly (16), including an electric motor (261) and a reduction gearbox (265), first and second (133) mechanical modules for filtering vibrations, and an output shaft (20), inserted at least partially in a casing (17), the electromechanical actuator (11) extends along a longitudinal axis (X), the first and the second mechanical modules (33, 133) being disposed on either side of the motor assembly (16) along the longitudinal axis (X) and each having a rigid transmission coupling, with at least a first degree of freedom perpendicularly to the longitudinal axis (X), allowing the motor assembly (16) to move along a plane perpendicular to the longitudinal axis (X), the electromechanical actuator also comprising at least one elastic module (130) that limits the movement of the motor assembly (16) along the perpendicular plane.

An electromechanical actuator (11) for a closure, obscuring or solar protection installation (6) includes a motor assembly (16), including an electric motor (261) and a reduction gearbox (265), first and second (133) mechanical modules for filtering vibrations, and an output shaft (20), inserted at least partially in a casing (17), the electromechanical actuator (11) extends along a longitudinal axis (X), the first and the second mechanical modules (33, 133) being disposed on either side of the motor assembly (16) along the longitudinal axis (X) and each having a rigid transmission coupling, with at least a first degree of freedom perpendicularly to the longitudinal axis (X), allowing the motor assembly (16) to move along a plane perpendicular to the longitudinal axis (X), the electromechanical actuator also comprising at least one elastic module (130) that limits the movement of the motor assembly (16) along the perpendicular plane.

A seal enclosure protects a tubular motor that is configured to drive an awning roller. The seal enclose includes a motor box sized to fit over an end of the tubular motor, a motor box extension engaging the motor box and including a circumferential protrusion, a gasket positioned between the motor box and the motor box extension, and a flexible seal engaging the circumferential protrusion and configured to engage the awning roller. The motor box, the motor box extension and the flexible seal define a closed housing for the tubular motor.

A seal enclosure protects a tubular motor that is configured to drive an awning roller. The seal enclose includes a motor box sized to fit over an end of the tubular motor, a motor box extension engaging the motor box and including a circumferential protrusion, a gasket positioned between the motor box and the motor box extension, and a flexible seal engaging the circumferential protrusion and configured to engage the awning roller. The motor box, the motor box extension and the flexible seal define a closed housing for the tubular motor.

A fire door operator for a rolling door includes a housing defining an axis. An outer main gear in the form of an annular ring is mounted within the housing for rotation about the axis and formed with exterior gear teeth and radially inwardly spaced interior teeth. Planet gears are meshed with the interior teeth and a sun gear is meshed with the planet gears for rotation about the axis. A carrier is secured to the planetary gears and coupled to the shaft. A lock normally locks the main gear in relation to the housing. A drive selectively rotates the sun gear and the carrier to transmit rotational power to a rolling door shaft when secured to the carrier. A releasing device selectively releases the lock to allow free rotation of the main gear and the carrier to allow a rolling door to be lowered under its own weight.

A fire door operator for a rolling door includes a housing defining an axis. An outer main gear in the form of an annular ring is mounted within the housing for rotation about the axis and formed with exterior gear teeth and radially inwardly spaced interior teeth. Planet gears are meshed with the interior teeth and a sun gear is meshed with the planet gears for rotation about the axis. A carrier is secured to the planetary gears and coupled to the shaft. A lock normally locks the main gear in relation to the housing. A drive selectively rotates the sun gear and the carrier to transmit rotational power to a rolling door shaft when secured to the carrier. A releasing device selectively releases the lock to allow free rotation of the main gear and the carrier to allow a rolling door to be lowered under its own weight.

A clutch assembly for a roller door operator, the clutch assembly providing selective engagement with a drive wheel, the clutch assembly comprising: a rotatable shaft rotatable relative to the drive wheel; a clutch disc supported in a clutch lever and arranged to rotate with the rotatable shaft, the clutch disc and clutch lever configured to rotate relative to one another around the axis of rotation of the shaft; and a clutch cam supported in a clutch base, the clutch base configured to permit operative rotation of the clutch cam around the axis of rotation of the shaft in a first direction; wherein the clutch lever is operatively associated with the clutch cam so that rotational movement of the clutch lever in a second direction opposite to the first direction actuates movement of the clutch disc and the clutch lever axially along the rotatable shaft to engage or disengage the clutch disc with the drive wheel, and subsequent rotational movement of the clutch lever in the first direction actuates rotational movement of the clutch cam relative to the clutch base in the first direction.