Patent ID: 8128277

Claim:
A contactlessly, inductively, or magnetically drivable agitator ( 1 , 30 ) for fluids, in particular for agitating sterile fluids, comprising: a separating vessel ( 10 , 50 ) and an agitator head ( 2 , 31 ), which is supported thereon in an axially and radially movable fashion and is for supporting agitating elements ( 5 , 57 ), wherein the agitator ( 1 , 30 ) includes means for hydrodynamically generating a fluid film from the fluid to be agitated during operation, the fluid film is formed between a stationary disk ( 15 ) at a bottom end of a stationary bearing pin ( 9 ) and a rotor disk ( 14 ) movable in an axial and radial direction and provided at a bottom end of movable bearing bushing ( 8 ), with stationary disk ( 15 ) and rotor disk ( 14 ) being oriented perpendicular in relation to a rotation axis A of the agitator head ( 2 ) and in a coaxial and coplanar fashion, wherein the bearing bushing ( 8 ) is inserted into an upper bearing ring ( 4 ) of the agitator head ( 2 ) while the agitator head ( 2 ) is slid with said bearing bushing ( 8 ) onto said stationary bearing pin ( 9 ) and wherein the stationary disk ( 15 ) extends outwardly from the stationary bearing pin ( 9 ) and the rotor disk ( 14 ) extends outwardly from the bearing bushing ( 8 ), wherein an underside ( 16 ) of the rotor disk ( 14 ), oriented toward the stationary disk ( 15 ), is provided with hydrodynamically acting structures, wherein the hydrodynamically acting structures comprise at least one of microgrooves ( 20 - 24 ) and a wavy face, wherein the microgrooves for operation in one rotation direction are selected from the group including V-grooves and spiral grooves and the grooves for operation in both rotation directions are selected from the group including T-grooves, U-grooves, and Christmas tree-shaped grooves.