Patent ID: 7862310

Claim:
A fuel pump having a pump stage driven by an electric motor, comprising: a jacket surrounding the electric motor and the pump stage; an impeller arranged rotatably between two casing parts of the pump stage, an inlet duct being arranged in an inlet-side casing part of the casing parts and an outlet duct being arranged in an outlet-side casing part of the casing parts, rings of guide blades being arranged in the impeller and delimiting blade chambers, and part-annular ducts being arranged in the two casing parts and located opposite the rings of the guide blades, a part-annular duct of the inlet-side casing part being connected to the inlet duct and a part-annular duct of the outlet-side casing part being connected to the outlet duct; wherein each of the two casing parts includes a disk element and one of the part-annular ducts and includes, on an outer circumference of the disk element, connecting elements having force introduction surfaces for connection to one of adjoining components of the jacket and the electric motor; and wherein the connecting elements are arranged in a region of the two casing parts at which buckling of the two casing parts occurs, and supporting elements are provided which are configured to reverse forces introduced into the outlet-side casing part at the force introduction surfaces and generate counterforces corresponding to the forces introduced into the outlet-side casing part.