SEALED CLUTCH THRUST BEARING DEVICE AND DRIVELINE SYSTEM INCLUDING SUCH A DEVICE

A clutch thrust bearing device including a rolling bearing, an axially movable piston having a radial plate, and a resilient biasing member. At least one between the inner and the outer peripheries of the radial plate of the axially movable piston is provided with a bearing sealing element of resilient material having at least one sealing lip in sliding contact with the rotatable ring of rolling bearing.