Patent ID: 7507949

Claim:
A positioning device, comprising: a housing; a shaft swivelable relative to the housing, an end of the shaft attachable to a component to be positioned; a roller-bearing unit adapted to support the shaft with respect to the housing, a first part of the roller-bearing unit connected in rotatably fixed manner to the shaft, a second part of the roller-bearing unit connected in rotatably fixed manner to the housing; a swivel drive including a stator and a rotor, the rotor movable relative to the stator; a position-measurement device including two parts movable relative to each other; and a ring diaphragm secured to the roller-bearing unit and to the housing; wherein the rotor of the swivel drive and a first part of the position-measurement device are connected in rotatably fixed manner to the shaft, the shaft arranged torsionally stiff and axially movable relative to the housing by the ring diaphragm.