Patent ID: 7785087

Claim:
A vane cell pump with an inner rotor and a plurality of vanes, which are essentially mounted radially displaceable in radial slots in the inner rotor and are guided by one of directly and indirectly on the internal circumferential surface of a stator, an axis of the stator and an axis of the inner rotor being offset in relation to one another, and the stator being radially adjustable in relation to the inner rotor, and the offset being consequently modifiable, and the stator comprising a pivot bearing arranged in a housing of the vane cell pump, characterized in that at least one piston section protrudes from the stator, whose piston axis runs in the circumferential direction with respect to the pivot bearing at an intersection of the piston axis and a circumference of the stator, and the piston is guided in a cylinder provided in the housing, and when pressurized, exerts a pivot force on the stator.