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1. (WO2019002629) TORSIONAL VIBRATION DAMPER AND LOCK-UP CLUTCH FOR HYDROKINETIC TORQUE-COUPLING DEVICE, AND METHOD FOR MAKING THE SAME
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What is claimed is:

1 . A hydrokinetic torque-coupling device for coupling a driving shaft and a driven shaft together, comprising:

a casing rotatable about a rotational axis and having a locking surface:

a torque converter (140) including an impeller wheel (200) rotatable about the rotational axis and a turbine wheel (220) disposed in the casing coaxially with the rotational axis, the turbine wheel disposed axially opposite to the impeller wheel and hydro-dynamically rotationally drivable by the impeller wheel;

a lock-up clutch (151 ) including a locking piston (340) axially moveable along the rotational axis to and from the locking surface of the casing, the locking piston including a substantially radially oriented piston plate (380); and

a torsional vibration damper (160) comprising

a torque input member (440) including a substantially radially oriented cover plate (480), a support plate (500) disposed axially opposite the cover plate, and at least one supporting member (600) disposed between the cover plate and the support and mounted to both the cover plate and the support plate; and

a unitary radially elastic output member (460) pivotable relative to and elastically coupled to the torque input member (440), the radially elastic output member disposed axially between the cover plate and the support plate;

the radially elastic output member including an output hub (540) coaxial with the rotational axis and rotatable relative the torque input member, and at least one curved elastic blade (560) non-moveably connected to the output hub and configured to elastically and radially engage the at least one supporting member and to elastically bend in the radial direction upon rotation of the cover plate with respect to the radially elastic output member;

the at least one elastic blade defining a curved raceway (66) configured to bear the at least one supporting member;

the locking piston non-rotatably coupled to the support plate of the torque input member of the torsional vibration damper;

the radially elastic output member being covered from axially opposite sides by the support plate and the cover plate ;

the cover plate at least partially covering an axially first outer surface of the radially elastic output member facing the cover plate;

the support plate partially covering an axially second outer surface of the radially elastic output member facing the support plate;

the locking piston having an engagement surface configured to selectively frictionally engage the locking surface of the casing to position the hydrokinetic torque-coupling device into and out of a lockup mode in which the locking piston is mechanically frictionally locked to the casing so as to be non-rotatable relative to the casing.

2. The hydrokinetic torque-coupling device as defined in claim 1 , wherein the cover plate covers no less than 70% of an area of the axially first outer surface of the radially elastic output member facing the cover plate, and wherein the support plate covers no more than 90% of an area of the axially second outer surface of the radially elastic output member facing the support plate.

3. The torsional vibration damper as defined in claims 1 or 2, wherein the support plate is an annular plate.

4. The hydrokinetic torque-coupling device as defined in any of the preceding claims, wherein the impeller wheel includes an impeller shell and the turbine wheel includes a turbine shell disposed axially opposite the impeller shell, and wherein the casing includes the impeller shell and a cover shell non-moveably connected to the impeller shell to establish the casing.

5. The hydrokinetic torque-coupling device as defined in any of the preceding claims, wherein the locking piston (340) includes at least one coupling lug (420) axially extending from the locking piston toward the torsional vibration damper, wherein the support plate (500) includes at least one notch (530n) positively engaged by the at least one coupling lug so as to non-rotatably couple the locking piston and the support plate.

6. A hydrokinetic torque-coupling device for coupling a driving shaft and a driven shaft together, comprising:

a casing rotatable about a rotational axis and having a locking surface;

a torque converter including an impeller wheel rotatable about the rotational axis and a turbine wheel disposed in the casing coaxially with the rotational axis, the turbine wheel disposed axially opposite to the impeller wheel and hydro-dynamically rotationally drivable by the impeller wheel;

a lock-up clutch including a locking piston axially moveable along the rotational axis to and from the locking surface of the casing, the locking piston including a substantially radially oriented piston plate; and

a torsional vibration damper comprising

a torque input member (44) including a substantially radially oriented cover plate (48), a support plate (50) disposed axially opposite the cover plate, and at least one supporting member (60) disposed between the cover plate and the support and mounted to both the cover plate and the support plate; and

a unitary radially elastic output member (46) pivotable relative to and elastically coupled to the torque input member (44), the radially elastic output member disposed axially between the cover plate and the support plate;

the radially elastic output member including an output hub (54) coaxial with the rotational axis and rotatable relative the torque input member, and at least one curved elastic blade (56) non-moveably connected to the output hub and configured to elastically and radially engage the at least one supporting member and to elastically bend in the radial direction upon rotation of the cover plate with respect to the radially elastic output member;

the at least one elastic blade defining a curved raceway (66) configured to bear the at least one supporting member;

the locking piston non-rotatably coupled to the cover plate of the torque input member of the torsional vibration damper;

the radially elastic output member being covered from axially opposite sides by the piston plate and the cover plate;

the cover plate at least partially covering an axially first outer surface of the radially elastic output member facing the cover plate;

the support plate partially covering an axially second outer surface of the radially elastic output member facing the support plate;

the locking piston having an engagement surface configured to selectively frictionally engage the locking surface of the casing to position the hydrokinetic torque-coupling device into and out of a lockup mode in which the locking piston is mechanically frictionally locked to the casing so as to be non-rotatable relative to the casing.

7. The hydrokinetic torque-coupling device as defined in claim 6, wherein the cover plate covers no less than 70% of an area of the axially first outer surface of the radially elastic output member facing the cover plate, and wherein the support plate covers no more than 30% of an area of the axially second outer surface of the radially elastic output member facing the support plate.

8. The hydrokinetic torque-coupling device as defined in claim 6 or 7, wherein the support plate is a rectangular plate or annular plate.

9. The hydrokinetic torque-coupling device as defined in any of the preceding claims, wherein the output hub of the radially elastic output member is rotatable relative to the turbine wheel.

1 0. The hydrokinetic torque-coupling device as defined in any of the preceding claims, wherein the at least one supporting member is covered in the axial direction by the piston plate and the cover plate.

1 1 . The hydrokinetic torque-coupling device as defined in any of the preceding claims, wherein the cover plate is non-rotatably coupled to the turbine wheel.

1 2. The hydrokinetic torque-coupling device as defined in any of the preceding claims, wherein the locking piston further includes a connection member non-moveable relative to the piston plate, and wherein the connection member includes at least one coupling lug non-rotatably coupling the piston plate to the cover plate of the torque input member of the torsional vibration damper.

1 3. The hydrokinetic torque-coupling device as defined in any of the preceding claims, wherein the locking piston is non-rotatably coupled to and axially moveable relative to the torque input member of the torsional vibration damper.

14. The hydrokinetic torque-coupling device as defined in claim 12, wherein the locking piston includes at least one coupling lug axially extending from the locking piston toward the torsional vibration damper, wherein the cover plate includes at least one notch positively engaged by the at least one coupling lug so as to non-rotatably couple the locking piston and the cover plate.

1 5. A method for assembling a torsional vibration damper of a hydrokinetic torque-coupling device for coupling a driving shaft and a driven shaft together, the method comprising the steps of:

providing a piston plate, a cover plate, a support plate and at least one supporting member;

providing a unitary radially elastic output member including an output hub and at least one curved elastic blade non-moveably connected to the output hub and configured to elastically and radially engage the at least one supporting member and to elastically bend in the radial direction;

mounting the at least one supporting member to the cover plate;

placing the unitary radially elastic member axially between the cover plate and the piston plate so that the at least one elastic blade elastically and radially engages the at least one supporting member;

mounting the support plate to the cover plate so that the at least one supporting member is disposed between the cover plate and the support plate; and non-rotatably mounting the piston plate to the cover plate so that the radially elastic output member being covered from axially opposite sides only by the piston plate and the cover plate;

the cover plate at least partially covering an axially first outer surface of the radially elastic output member facing the cover plate;

the support plate partially covering an axially second outer surface of the radially elastic output member facing the support plate.