Patent ID: 7165734

Claim:
A device for mixing and homogenizing materials, in particular infectious or chemically aggressive materials, in a laboratory test container with a stirring element, the device comprising a lid and the laboratory test container, the lid defining a cylindrical tube portion having a first end and a second end and a cap portion, wherein the first end of the tube portion is attached to the cap portion and extends from the first end to the second end away from the cap portion thereby defining a groove between the tube portion and the cap portion and, wherein the laboratory test container is received within the groove whereby the tube portion extends a distance within the laboratory test container and abuts against an inner surface to seal the laboratory test container hermetically, the stirring element is provided in the lid to process the material that can be introduced into the laboratory test container, and a cutting element having cutting edges is provided between the first end and the second end of the tube portion of the lid, wherein the cutting element rotates about a longitudinal axis of the laboratory test container and which is arranged in the immediate vicinity of second cutting edges provided on an inner surface of the tube portion of the lid.