Patent ID: 8720806

Claim:
A laboratory grinding mill, comprising: at least one grinding bowl configured to carry out a rotary movement about a central axis of said grinding bowl, wherein said at least one grinding bowl is also configured for conveyance of a liquid or gaseous medium through said grinding bowl; a rotary lead-through device having a stationary part and a movable part that is coupled to movement of said at least one grinding bowl; wherein said stationary part is provided with at least one connection for a respective fixed stationary conduit; and wherein said movable part is provided with at least one connection for a respective conduit that leads to said at least one grinding bowl, wherein connected to each grinding bowl is a first conduit for supplying medium to said grinding bowl and a second conduit for withdrawal of medium from said grinding bowl, wherein both said first conduit and said second conduit are guided via said rotary lead-through device, and wherein each of said stationary part and said movable part of said rotary lead-through device is provided with two of said connections.