Patent ID: 9709146
Date: 2017-07-18
CPC Classifications: F16D,F16H

Claim:
1. A lock-up device for a torque converter, the lock-up device being disposed between a front cover and a turbine to transmit or cut transmitting of a torque, the lock-up device comprising: a piston disposed between the front cover and the turbine, the piston being axially slidable by operating oil; a clutch part configured to transmit or cut transmitting of the torque from the front cover to the turbine by actuation of the piston; a first hydraulic chamber formed on a piston side of the front cover; a second hydraulic chamber formed independently from the first hydraulic chamber, an entirety of the second hydraulic chamber being disposed between the first hydraulic chamber and the piston in an axial direction substantially parallel to an axis of rotation of the torque converter; an axially immovable compartment plate disposed between the first and second hydraulic chambers; a first hydraulic port being in communication with the first hydraulic chamber; and a second hydraulic port being formed independently from the first hydraulic port, a portion of the second hydraulic chamber being in communication with the second hydraulic port; the first hydraulic chamber being sealed with the exception of a portion of the first hydraulic chamber which is in communication with the first hydraulic port; and the second hydraulic chamber being sealed with the exception of the portion of the second hydraulic chamber which is in communication with the second hydraulic port.