Importance

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Abstract

The invention relates to a tool head for a device that is used to automatically isolate and treat cell clones by means of a cloning dome, which isolates the respective cell clone from the environment, said cloning dome being held in a detachable manner by the tip of a pipette and the latter being fixed by a non-positive fit to a conical receiving element of the tool head. To hold the cloning dome on the tip of the pipette, the latter comprises a conical section, over which a complementary conical section of the cloning dome is folded and the tool head is fixed to an arm of a robot system. According to the invention, the end of the arm that is located on the tool head side is equipped with a receiving block (1), which has a lower (2) and an upper (3) stop to delimit the displacement path of a displaceable holder (4) for the pipette tip receiving element, said holder (4) being guided on the receiving block (1) by means of a linear guide (5). In addition, the upper stop (3) is configured as a graduated, laminated spring assembly (12, 13, 14) that is fixed on one side, in such a way that graduated stop forces are produced over the predetermined constant displacement path during the displacement of the arm and tool head towards a fixed point, thus producing a defined frictional connection of the conical holders of the tip of the pipette and the cloning dome.

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First Claim