PURPOSE: To enable the elimination of adverse effects to culture liquid such as the disintegration of cells with the bearing in the tank, contamination of the culture liquid caused by the abrasion of the bearing, etc., by rotating a stirring blade with a magnetic supporting member without using a bearing in the tank.
CONSTITUTION: A cylindrical partition wall 3 is protruded from the bottom into the main body 1 of the culture tank, and a rotary shaft 4 is inserted into the cylindrical wall 3. Plural magnets 11 are fixed to the rotary shaft 4 with definite intervals along the direction of the shaft. A stirring blade 15 is fixed to the outer circumference of the partition wall 3 in the tank 1, and the magnet supporting member 13 having fixed magnet 14 is inserted in a freely rotatable manner. The magnet 11 fixed to the rotary shaft 4 and the magnet 14 fixed to the magnet supporting member 13 are disposed in a manner to generate repulsive force with each other and to effect the rotation of the stirring blade 15. The bearing in the tank is eliminated by this method, and accordingly, the adverse effects to culture liquid such as the disintegration of cells with the bearing in the tank, contamination of the culture liquid caused by the abra sion of the bearing, etc., can be eliminated.
HOSOMI NOBUYUKI
MURAKAMI SEI
