Patent ID: 8632449

Claim:
A heart pump including: a) first and second cavity portions, each cavity portion including a respective inlet and outlet; b) a connecting tube extending between the first and second cavity portion; c) an impeller including: i) a first set of vanes mounted on a first rotor in the first cavity portions; ii) a second set of vanes mounted on a second rotor in the second cavity portion; and, iii) a shaft connecting the first and second rotors, the shaft extending through the connecting tube; iv) a first magnetic material mounted in the first rotor; and v) a second magnetic material mounted in the second rotor; d) a drive for rotating the impeller, the drive being positioned adjacent the second cavity, the drive and second magnetic material being configured to result in an attractive force between the drive and the second rotor; and, e) a magnetic bearing including at least one bearing coil for controlling an axial position of the impeller, the magnetic bearing being positioned adjacent the first cavity, the magnetic bearing and first magnetic material being configured to result in an attractive force between the magnetic bearing and the first rotor; and wherein at least one of the drive and magnetic bearing being provided at least partially between the first and second cavity portions.