Patent ID: 7143880

Claim:
A torque converter, comprising: a front cover connected to an engine with a set block; a pump impeller integrally connected to the front cover; a turbine runner facing to the pump impeller and connected to an input shaft of a transmission; a lock-up clutch provided inside the front cover to be in line with a torus portion which is comprised of the pump impeller and the turbine runner in axial direction of the input shaft for engaging/disengaging the front cover relative to the input shaft through a damper; an engaging hydraulic pressure chamber separated from a power transmission hydraulic chamber surrounded by the pump impeller and the front cover integrated therewith, and that engaging pressure of the lock-up clutch is provided into the engaging hydraulic pressure chamber; a front cover hub provided between the front cover and the input shaft; a piston provided at the lock-up clutch and inserted so as to slide in the engaging hydraulic pressure chamber; a clutch engaging portion provided at the lock-up clutch and operated to be engaged/disengaged by the piston; plural projection portions provided at the front cover hub, formed to be projecting toward the front cover side by stamping, and welded to the front cover, and an oil path formed between the front cover and the front cover hub among the projection portions.