Patent ID: 8303268
Filing Date: 2012-11-06
Classification: F04D,F05D,Y10T

Abstract:
1. A rotary pump driven by an electric motor with a stator, the rotary pump comprising: a multipart pump having a motor housing and a pump housing including a first pump housing part defining a pump head with an inside wall area inside of the pump housing; a pressure connector connected to the first housing part; a suction connector connected to the pump head; an elongated fixed shaft defining an axial direction and having a first end and a second end, the first end being in the pump housing and the second end being in the motor housing; mounting means for exclusively and fixedly supporting the elongated fixed shaft in the pump housing at the first end and allowing the second end to extend freely unsupported, the second end extending into the motor housing with no point of attachment to the motor housing; an electric motor including: a permanent magnet pump impeller located in the pump housing; and a stator located in the motor housing, the stator causing the permanent magnet pump impeller to rotate about the fixed shaft; and a bearing for providing exclusive rotatable mounting of the impeller only in the pump housing to the first end of the fixed shaft, the bearing including a radial bearing and axial bearings, both the mounting means for fixedly mounting and the bearing being located outside the extent of the stator in the axial direction, and the fixed shaft extending within the extent of the stator in the axial direction.