Patent ID: 8596999

Claim:
A disposable centrifugal blood pump with magnetic coupling comprising: a disposable housing including a top surface, a side surface and a bottom with an inflow at the top surface and an outflow at the side surface; and a stator detachably connected to the housing, wherein the housing includes: a cylindrical rotor being formed of magnetic material and including an outer peripheral surface and inner peripheral surface; and an impeller integrated to the rotor, wherein the cylindrical rotor includes ring-shaped pole faces extending along a circumferential direction of the outer peripheral surface thereof and a plurality of pole faces projecting inward from the inner peripheral surface wherein said stator includes: three or more electromagnets for electromagnetic coupling, the three or more electromagnets being arranged around the housing at regular intervals and having pole faces opposed to the pole faces projected of the outer peripheral surface of the rotor, the electromagnets to generate a magnetic coupling between the stator and the rotor; a torque transmission disk being formed by sandwiching a ring-shaped permanent magnet magnetized in an axial direction between an upper ring member and a lower ring member, the upper ring member and the lower ring member including a magnetic material and having a plurality of pole faces corresponding to the pole faces at the inner peripheral surface of the rotor for generating a magnetic coupling between the torque transmission disk and the rotor; a motor arranged apart from said housing for rotating the torque transmission disk; and wherein the bottom of the housing includes a cylindrical shape along a contour shape of the rotor and detachably attached between said electromagnets and the torque transmission disk.