Patent ID: 8114008
Filing Date: 2012-02-14
Classification: A61M,F04D

Abstract:
1. A blood pump comprising: a rotating body rotatably placed inside a casing a magnetic coupling functioning as an axial bearing including a driven magnet that is a permanent magnet provided to the rotating body and a drive magnet that is a permanent magnet placed face to face with the driven magnet in a radial direction of the rotating body outside the casing to be magnetically coupled with the driven magnet; a drive that rotatably drives the drive magnet about an axis of the rotating body; a radial bearing that is a dynamic bearing having annular bearing surfaces centering on the axis on an inner wall of the casing and the rotating body, each of the annular bearing surfaces being arranged with a gap between the drive magnet and the driven magnet in the radial direction of the rotating body; and a closed impeller including a front shroud arranged on a front side in the axis direction in the rotating body, a rear shroud arranged on a rear side in the axis direction of the front shroud, and a vane arranged between the front shroud and the rear shroud, wherein the driven magnet is provided to a cylindrical shaft included in the rotating body, and the drive magnet is arranged outside in a radial direction of the shaft with respect to the driven magnet.