Patent ID: 7467929
Filing Date: 2008-12-23
Classification: A61M,F04D

Abstract:
1. A device for axially conveying fluids, comprising: a tube-shaped hollow body having a constant internal diameter for conducting fluid in an essentially axial manner, a motor stator located outside of the hollow body, a conveying part responsive to the motor stator and arranged within the hollow body in axial alignment with the hollow body, the conveying part including a central motor rotor having a continuous outer surface extending between a first end and a second end, blading fixed to the continuous outer surface for conveying fluid within the hollow body upon rotation of the conveying part by the motor stator, at least one hollow ring fixed to a radial outer portion of the blading defining a hydrodynamic radial bearing, the hollow ring defining the hydrodynamic radial bearing having an inner surface that is radially inwardly bowed toward the central rotor continuous outer surface for conditioning the fluid inflow into the rotor blading of the conveying part, an actively stabilizing magnetic axial bearing, and a passive magnetic radial bearing located within the hollow body, the bearings maintaining the conveying part within the tube-shaped hollow body in proximity to the motor stator.