Patent ID: 8951785
Filing Date: 2015-02-10
Classification: B01F,C12M

Abstract:
1. A stirrer ( 1 , 1 ′, 1 ″, 1 ′″, 1 ″″) for bioreactor tanks ( 21 ) having flexible walls ( 22 ), the stirrer comprising: a plurality of articulately connected arms ( 2 , 3 , 28 , 29 ) which are respectively pivotable about a transverse axis ( 11 ) and are jointly rotatable about a rotational axis ( 10 ), the plurality of arms including a first arm ( 2 ) with a first arm end ( 9 ) disposed on a first shaft ( 7 ) of a first mounting ( 4 ) fastened to a first side ( 23 ) of the tank ( 21 ), the first shaft ( 7 ) being rotatable about the rotational axis ( 10 ), the plurality of arms further including a last arm ( 3 , 28 , 29 ) having a first arm end ( 50 ) and a second arm end ( 18 , 20 , 30 ) opposite the first arm end ( 50 ) of the last arm ( 3 , 28 , 29 ), the second arm end ( 18 , 20 , 30 ) of the last arm ( 3 , 28 , 29 ) facing away from the first arm ( 2 ) and being disposed on a second shaft ( 16 , 16 ′″, 16 ″″) of a second mounting ( 5 , 5 ′″, 5 ″″) and the plurality of arms further comprising a second arm ( 3 ″) with a second arm end ( 18 ″) pivotably connected to the first arm end ( 50 ) of the last arm ( 3 , 28 , 29 ), the second mounting ( the first arm end (