Patent ID: 8403118

Claim:
A torque converter, comprising: a turbine shell; a pump shell; a turbine hub; a drive hub for connecting to an input shaft; a first orifice through the drive hub; a damper including a cover plate for accepting torque input to the damper; a lock-up clutch including: a first clutch plate directly engaged with the turbine hub fixed with respect to rotation to the turbine hub, and sealed with respect to the turbine hub; an apply plate at least indirectly connected to the pump shell so that the rotation of the apply plate is fixed to the rotation of the pump shell; a second clutch plate directly connected to the cover plate so that the rotation of the cover plate is fixed to the rotation of the second clutch plate; and, a piston plate; a first fluid chamber at least partially formed by the piston plate, the first clutch plate, and the apply plate; and, a second fluid chamber at least partially formed by the first clutch plate, the turbine shell, the pump shell, and the apply plate, wherein when the lock-up clutch is closed, the first chamber is sealed with the exception of: the first orifice; and, a first fluid flow path through a second orifice through the apply plate; or, a second fluid flow path through the lock-up clutch to the second fluid chamber.