Abstract: A tensioning device comprising a receiver housing, a lever arm mounted on the receiver housing and rotatable with respect to the receiver housing around a first rotation axis, a pulley mounted on the lever arm and rotatable with respect to the lever arm around a second rotation axis parallel to the first rotation axis, and a spring mounted between the receiver housing and the lever arm and adapted to apply a torque for rotating the lever arm around the first rotation axis. The receiver housing and the lever arm are screwed together around the first rotation axis. The spring applies an axial damping effort, parallel to the first axis, on cooperating threaded portions respectively provided on the receiver housing and on the lever arm.

Abstract: A tensioning device comprising a receiver housing, a lever arm mounted on the receiver housing and rotatable with respect to the receiver housing around a first rotation axis, a pulley mounted on the lever arm and rotatable with respect to the lever arm around a second rotation axis parallel to the first rotation axis, and a spring mounted between the receiver housing and the lever arm and adapted to apply a torque for rotating the lever arm around the first rotation axis. The receiver housing and the lever arm are screwed together around the first rotation axis. The spring applies an axial damping effort, parallel to the first axis, on cooperating threaded portions respectively provided on the receiver housing and on the lever arm.

Abstract: A pulley device for a belt or chain, the pulley device comprising a bearing provided with an external ring, an internal ring, and at least one row of rolling elements mounted in a bearing chamber defined between the external and internal rings. A pulley is secured in rotation with the external ring and provided with an external radial surface for engaging with a belt or chain. Also included is at least one hollow shaft able to receive a screw for mounting the pulley device on a support. The hollow shaft forming a structural unit comprising a bushing, a flange secured to the bushing, and which extends, from the bushing, radially outwards, respective to a central axis of the hollow shaft, as far as the bearing chamber. The flange is formed with a washer and an endplate, while the washer is radially located between the bushing and the endplate.