Patent ID: 8807920

Claim:
A pump assembly comprising at least one impeller ( 12 ), a drive device ( 2 ), a rotatable rotor shaft ( 10 ), at least one axial bearing ( 36 , 40 ) and a sole radial bearing ( 30 , 32 ), wherein the axial bearing ( 36 , 40 ) and the sole radial bearing ( 30 , 32 ) are integrated into a common bearing assembly ( 16 ) supported at a central portion of the rotor shaft ( 10 ) in an axial direction (X) of the shaft, and wherein the bearing assembly ( 16 ) further comprises a bearing ring ( 26 ) having an inner peripheral surface or an outer peripheral surface that forms a radial bearing surface ( 30 ), and wherein both axial-side end-faces ( 36 , 38 ) of the bearing ring ( 26 ) form axial bearing surfaces.