Abstract: The invention relates to a decoupling comprising two elements in rotation about a longitudinal axis, namely a rim and a hub, and also comprising a load support which ensures relative rotation between the rim and the hub, together with a torque transmission element positioned between the rim and hub, which comprises an elastic device deformable parallel to the longitudinal axis and comprising at least one elastic element, the pulley being characterized in that the torque transmission element comprises:—a first annular plate (1) connected in terms of rotation to one of the two elements, rim (4) or hub (3), and capable of moving axially with respect to thereto, having a first end face (11) in contact with a first end face (51) of the elastic device (5) and a second end face opposite to the first end face and comprising at least one first ramp path having at least one inclined zone (12, 14) forming a circular sector centred on the longitudinal axis and making a non-zero angle (?, ?1, ?2) with respect to a plane p