Patent ID: 8678987

Claim:
A centrifuge, comprising: a drive head configured to be connected with a drive; a rotor configured to be detachably mounted on the drive head; at least one connection element configured to connect the drive head in a torsion-proof manner with the rotor; and at least one coupling element attached to the drive head and configured to exert an axial force on the rotor so that the rotor is fixed axially, with the axial force increasing with a rising rotational speed of the drive head, wherein the coupling element on the rotor transmits the axial force via a ramp surface on the coupling element which is generally planar in cross-section and is inclined in a radially outwardly and upwardly direction at an angle relative to a horizontal line in a range of more than 0° to 15° when the drive head is connected to the rotor, wherein the drive head has a jacket surface which comprises a cylinder surface and a truncated cone surface, with the jacket surface engaging a corresponding holding surface associated with the rotor having a cylinder surface and a truncated cone surface when the rotor is mounted to the drive head, with the cylinder surface of the drive head having a length which is at least one quarter of the length of the holding surface, and further wherein the cylinder surface of the drive head is exclusively used for guiding the rotor in axial direction, and the surface of the truncated cone of the drive head is used as a stop surface in the axial direction during placement of the rotor on the drive head.