| 摘要 |
PROBLEM TO BE SOLVED: To provide an axial flow pump causing no coagulation of blood in a bearing part, causing no failure, and having durability in a blood pump for an artificial heart. SOLUTION: A motor stator 3d is arranged in an outer peripheral part of a pipe body 3 having a spindle-shaped recessed part 3b in an inner peripheral part; a permanent magnet 4d is sealed on the swelling inside of an outside cylindrical body 4a of swelling the outer peripheral part in a spindle shape; a motor rotor 4 formed by arranging a screw type impeller 4c in a central part of the outside cylindrical body 4a is arranged by loosely fitting to the pipe body 3; and clearance 3c between an outer peripheral surface of the motor rotor 4 and an inner peripheral surface of the pipe body 3 is formed as a dynamic pressure bearing by a hydraulic fluid. COPYRIGHT: (C)2005,JPO&NCIPI
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