A hydrokinetic torque coupling device comprises a casing rotatable about a rotation axis, a torque converter including an impeller wheel and a turbine wheel disposed in the casing coaxially with the rotation axis, a turbine hub disposed in the casing coaxially with the rotation axis and fixed to the turbine wheel, and a torsional vibration damper. The torsional vibration damper comprises a driven member fixed to the turbine hub, a drive member rotatable relative to the driven member about the rotation axis, and a plurality of circumferentially acting outer and inner elastic damping members. The drive member and the driven member are operatively connected to both the radially outer and inner elastic damping members. The radially outer and inner elastic damping members are arranged in series.

A clutch plate including first and second plates with the first plate having a friction material applied about its peripheral edge. A hub for connection to an output shaft and having a hub flange. The first and second plates being angularly displaceable relative to each other and being coupled by at least two drive springs. A sleeve extends about a portion of each of the drive springs so that a portion of each of the drive springs extends out of the sleeve. The sleeve being interposed between a radially outer surface of the springs and a facing bearing surface formed by the plates. The arrangement is such that during compression of the springs, the springs are moveable within the sleeves relative to the sleeves and the sleeves are moveable relative to the bearing surface of the plates.

The present invention relates to a lockup apparatus for a torque converter and aims to obtain a smooth relative movement of a equalizer plate with respect to a deformation of a drive plate. The drive plate 26 as an inlet sided rotating member is connected to a driven plate 22 as an outlet sided rotating member by means of damper springs 28 in a rotating direction. The damper spring 28 is constructed by a pair of divided parts 28A and 28B. An equalizer plate as an intermediate member 29 is arranged so as to slide rotatably on bearing parts 26-1 of the drive plate 26 and supporting parts 40 fixed to the equalizer plate 29 are arranged between the divided parts 28A and 28B of the damper springs 28. The bearing part 26-1 of the drive plate 26 has an outer peripheral surface 26-1a, of which arc shape has a center C of a curvature which is offset from the center C of the arc shape of the inner peripheral surface 29a of the equalizer plate 29.

A torsional damper for vehicle transmission systems comprises an input element rotationally movable around an axis and exhibiting at least one window comprising two angularly spaced lateral edges and a radially external edge. An output element is rotationally movable around the axis and exhibits at least one window comprising two angularly spaced lateral edges and a radially external edge. An elastic return member capable of being received simultaneously in the window of the input element and the window of the output element generates a force acting against rotation of the output element with respect to the input element. An additional element is rotationally movable around the axis and integral with one of the input element and output element. The additional element exhibits an edge comprising at least one region projecting radially into the window of the input element and output element with which the additional element is integral.

A damper unit of an internal combustion engine includes an input-side rotor, an output-side rotor, first coiled springs, second coiled springs, an input-side sliding contact surface, and a biasing member. The input-side rotor includes a first spring holder, a second spring holder, and a connecting portion. The second spring holder is arranged on a second side of the output-side rotor, has a facing side facing the output-side rotor, and has second spring accommodation portions on the facing side each of which accommodates each of the second coiled springs. The input-side sliding contact surface is provided in the second spring holder so as to be in sliding contact with an output-side sliding contact surface of the output-side rotor. The biasing member is provided between the first spring holder and the output-side rotor to press the output-side rotor toward the second spring holder.

A hydrokinetic torque coupling device comprises a casing rotatable about a rotation axis, a torque converter including an impeller wheel and a turbine wheel disposed in the casing coaxially with the rotation axis, a turbine hub disposed in the casing coaxially with the rotation axis and fixed to the turbine wheel, and a torsional vibration damper. The torsional vibration damper comprises a driven member fixed to the turbine hub, a drive member rotatable relative to the driven member about the rotation axis, and a plurality of circumferentially acting outer and inner elastic damping members. The drive member and the driven member are operatively connected to both the radially outer and inner elastic damping members. The radially outer and inner elastic damping members are arranged in series.

A torsional vibration damper for a motor vehicle includes an input member having a first race and a second race, the first and the second races each having an outer race surface. An output member is rotatably connected to the input member. At least two springs are positioned in each of the first race and the second race. A spring carrier is positioned between and contacts successive ones of the springs in each of the first and the second races, the spring carrier having a roller in rolling contact with the outer race surface of the first race and the second race. The spring carriers having the roller in contact with the outer race surface of the first race and the second race prevents any of the springs from directly contacting the outer race surfaces during rotation of the output member with respect to the input member.