A pump for transferring fragile and aggressive fluids such as human blood and comprising a pumping chamber along with a pair of fluid inlet ports arranged in oppositely disposed relationship on the chamber, Vacuum pumpsand at least one outlet port arranged transversely and medially of the inlet ports. A rotor assembly is positioned within the pumping chamber having a core in the form of a first surface of revolution and having a dual-conical configuration converging toward opposed polar end regions and with an axis of rotation extending between the polar regions. At least one shroud is provided spaced outwardly of the surface of the core, with medial vanes being positioned between the surface of the core and shroud,Magnetic pumps the shroud defining a second surface of revolution coaxially with the axis of the core. The rotor assembly includes magnets which are arranged at radially spaced locations and with a magnetic drive positioned to deliver rotational driving energy to the rotor. The sole support for the rotor assembly are the hydrodynamic forces acting upon the assembly during its operation, with the rotor assembly body having a relative density of between 10% and 90% of the relative density of the fluid being pumped.

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2011-12-13

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