Patent ID: 7114604

Claim:
A torque converter having an impeller shell provided with a pump impeller and driven by an engine output shaft, and a turbine runner linked to a hollow main shaft so as to be opposed to said pump impeller, the torque converter comprising: a front cover with an inner disc portion, a tubular drum portion extending axially from said inner disc portion toward said pump impeller, and an outer disc portion extending radially from said drum portion and forming a converter chamber along with said impeller shell; a clutch hub connected to said main shaft with a driven plate engaged and a drive plate attached to said drum portion is attached; a lockup piston movably attached axially to an inside of said drum portion and forming an engagement oil chamber along with said inner disc portion; and a partition wall provided in said outer disc portion and sectioning said converter chamber and a clutch chamber for accommodating said drive plate and said driven plate.