US Patent 10288158 Fluid transmission device for vehicle

A fluid transmission device is provided. The device comprises a rotatable case having a rotational axis, coupled to a drive source, and provided therein with a pump shell for integrally rotating with the case and a turbine shell facing the drive source side of the pump shell, a drive force being transmitted between the pump shell and the turbine shell via fluid, and a dynamic vibration absorber having a swing body and for reducing vibration caused by the drive source. The dynamic vibration absorber overlaps with at least one of the pump shell and the turbine shell in an axial direction of the case.