SEALLESS ROTODYNAMIC PUMP.

摘要

A sealless centrifugal blood pump (10) is provided in which a rotatable impeller (64) is supported in a pump housing (12) by fluid bearings (30, 182) during operation. Rotational movement of the impeller (64) is accomplished with an inverted motor (38) for magnetically driving of the impeller (64) and maintenance of the axial running position of the impeller (64) relative to the housing (12). In an alternative embodiment, the axis of the rotor housing (18) is radially displaced relative to the axes of drive element (126) of the motor and the motor housing (130).