Patent ID: 8783942

Claim:
A device for stirring a liquid or a granular material comprising a stirring agitator adapted to be arranged in said liquid or granular material, a rotating drive shaft housed in a stationary housing for rotating the stirring agitator, a stationary axle extending from said stationary housing in an essentially vertical direction and into said stirring agitator so that said stirring agitator rotates about said stationary axle, and a transfer arrangement for contactless transfer of rotation of the drive shaft to the stirring agitator, wherein said rotating drive shaft extends from said stationary housing up to said stationary axle such that said transfer arrangement is arranged at a first end of said stationary axle, wherein the device has a center axis around which the stirring agitator and the drive shaft are adapted to rotate, and a magnetic assembly for generating a magnetic force exerting an upwardly directed force component on the stirring agitator, wherein the magnetic assembly for generating a magnetic force comprises a first element arranged in the stirring agitator and a second element associated with the stationary axle, and at least one of the first element and the second element comprises a permanent magnet, and wherein at least one of the first element and the second element is arranged such that the center axis extends through, or in the near proximity of, at least one of the first element and the second element, wherein the device comprises a radial bearing positioned between the stationary axle and the stirring agitator for radially supporting the stirring agitator on the stationary axle, said radial bearing comprising a stationary portion on said stationary axle and a rotatable portion on the stirring agitator, and wherein the transfer arrangement is arranged below the radial bearing and, wherein the second element is arranged in a top portion of the stationary axle.