Rotary damper with unidirectional coupling

Rotary damper comprising:

• a casing,
• an intermediate element mounted movably on the casing,
• a braking fluid arranged between the casing and the intermediate element so as to brake the movement of the intermediate element relative to the casing,
• a rotor mounted on the intermediate element rotatably about an axis of rotation, and
• a unidirectional coupling arranged between the intermediate element and the rotor, said unidirectional coupling being designed to couple rigidly the rotor together with the intermediate element in a first direction of rotation of the rotor relative to the casing and uncouple the rotor from the intermediate element in a second direction of rotation of the rotor relative to the casing, opposite to the first direction,
• wherein the unidirectional coupling comprises at least one radial block arranged between a radially outer surface of the rotor and a radially inner surface of the intermediate element, and at least one actuating lobe formed on the rotor and projecting radially from the radially outer surface thereof, the radial block comprising a wedge part designed to be engaged by the actuating lobe of the rotor during rotation in the first direction of rotation so as to push the radial block in a centrifugal direction and lock it between the rotor and the intermediate element, wherein the rotary damper further comprises a support disk mounted on the intermediate element coaxially with the axis of rotation, the radial block being pivotably mounted on the support disk about a pivoting axis parallel to said axis of rotation.