Patent ID: 9599206
Date: 2017-03-21
CPC Classifications: F16H

Claim:
1. A hydrokinetic torque coupling device for coupling together a driving shaft and a driven shaft, the hydrokinetic torque coupling device rotatable about a rotational axis and comprising: a casing comprising an impeller shell and a casing shell connected to and non-rotatable relative to the impeller shell, the casing being rotatable about the rotational axis and having a damper chamber; torque converter coaxially aligned with and rotatable about the rotational axis, the torque converter having a torus chamber and comprising direction away from the impeller beyond a maximum axial displacement position, wherein the turbine-piston is axially displaceable relative to the impeller to move the second engagement surface region towards and away from the first engagement surface region for positioning the hydrokinetic torque coupling device between a lockup mode in which the turbine-piston is mechanically locked to so as to be non-rotatable relative to the impeller and a non-lockup mode in which a fluid passageway extends through a first gap between the first and second engagement surface regions and a second gap between the first and second flow restriction surface regions to place the torus chamber and the damper chamber in fluid communication with one another, and wherein axial displacement of the turbine-piston into the maximum axial displacement position provides the first gap with a greater width than the second gap.