US Patent 10272940 Steering wheel actuation device

A steering wheel actuation device for retrofit mounting to a steering wheel of a motor vehicle and for applying a motor-driven torque to same includes a stator suitable for bracing against rotational movement and a rotor having attachment devices for the torque-proof attachment to the steering wheel, wherein said rotor is rotatable against the stator and wherein the stator features a U-shaped design, which extends over a curved section and forms an open section.