Patent ID: 6368075
Filing Date: 2002-04-09
Classification: A61M,F04D,F05B,F16C,H02K

Abstract:
A pump for a fluid comprising:a support tube; an elongated rotor rotatable in said support tube and having respective permanently magnetic rotor magnets at opposite ends of said rotor, and displacement elements on said rotor for displacing said fluid upon rotation of said rotor: means for radially suporting and positioning said rotor in said support tube and comprising: respective permanently magnetic stator magnets mounted on said support tube and juxtaposed with said rotor magnets in respective pairs, each stator magnet and rotor magnet pair being axially magnetized to attract and position said rotor radially within said tube solely with said permanent magnets; a magnetic axial stabilizer unit for stabilizing an axial position of said rotor in said tube; and an electric motor comprising a rotary-field-generating stator on said tube around said rotor, and a pole-forming magnet on said rotor driven by said rotary field for rotating said rotor.