Abstract: A torsion damper for a vehicle powertrain includes a first element rotatable about an axis, a second element rotatable with respect to the first element about the axis. The second element includes first and second axially spaced lateral washers mounted coupled in rotation. The first element includes an intermediate disc arranged axially between the lateral washers. Springs are mounted between the first and second element to allow relative rotation between the first and second element. A first friction device includes a first friction washer arranged between the first lateral washer and first element, and a first elastic washer arranged axially between the first element and the first friction washer. A second friction device includes a second friction washer arranged between the second lateral washer and the first element, and a second elastic washer arranged axially between the first element and the second friction washer.

Abstract: A vibration damping device for an automotive vehicle includes a torque transmission plate, two rotatably connected guide elements that are coaxial along an axis of rotation and positioned on either side of the torque transmission plate, and helical compression springs bearing on the torque transmission plate and the guide elements by means of seats positioned on the ends of the springs. Each seat includes a frontal face suitable for interacting with the end of the springs, comprising a centring flange, the centring axis of which is coincident with the axis of the springs. A dorsal face defines a geometric plane backing onto the frontal part, and an indentation extending inwards from the dorsal face.

Abstract: A torsion damper for a vehicle powertrain includes a first element rotatable about an axis, a second element rotatable with respect to the first element about the axis. The second element includes first and second axially spaced lateral washers mounted coupled in rotation. The first element includes an intermediate disc arranged axially between the lateral washers. Springs are mounted between the first and second element to allow relative rotation between the first and second element. A first friction device includes a first friction washer arranged between the first lateral washer and first element, and a first elastic washer arranged axially between the first element and the first friction washer. A second friction device includes a second friction washer arranged between the second lateral washer and the first element, and a second elastic washer arranged axially between the first element and the second friction washer.