Patent ID: 8225917

Claim:
A fluid coupling comprising: an input-side rotary element coupled with an input member, said input-side rotary element including a pump blade; and an output-side rotary element including a turbine shell having a turbine blade opposed to said pump blade, and a turbine hub coupled with an output member, said turbine hub being welded to an inner peripheral portion of said turbine shell; wherein said turbine shell and said turbine hub have contact surfaces, respectively, extending along a rotational axis of said fluid coupling, and wherein a joint portion is formed by welding on said contact surfaces closer to said pump blade, wherein said turbine shell has a boss at an inner peripheral portion thereof, said boss extending in the direction parallel to the rotational axis of said fluid coupling; an inner peripheral surface of said boss defining said contact surface of the turbine shell, and wherein said turbine hub has an annular groove at an outer peripheral portion thereof, said boss being inserted into said annular groove; an inner peripheral surface of said annular groove defining the contact surface of the turbine hub.