Patent ID: 8382461

Claim:
An impeller for a vane cell pump, comprising: a plurality of vane receptacles adapted to receive an at least radially movable pump vane; and a chamber wall formed between two adjacent vane receptacles of the plurality of vane receptacles to form a conveying chamber, wherein the chamber wall has an axially projecting web adapted to delimit a radial movement of a position ring with respect to a radial movement of the at least radially movable pump vane, and wherein the chamber wall comprises a first wall region having a first radius and adapted to securely receive the at least radially movable pump vane in at least one of the plurality of vane receptacles, a second wall region having a second radius that is less than the first radius, the second wall region continuous with the first wall region and adapted to form a web thickness of the axially projecting web for secure abutment of a sintering tool, a third wall region having a third radius that is less than the second radius, the third wall region being curved and continuous with the second wall region and adapted to form an enlarged conveying chamber volume, and a fourth wall region having the first radius, the fourth wall region continuous with the third wall region.