Patent ID: 8353632

Claim:
A fluid dynamic bearing system having: at least one stationary part, at least one rotating part that is supported rotatable about a rotational axis with respect to the stationary part, a bearing gap that is formed between the mutually opposing surfaces of the stationary and of the rotating part and filled with a bearing fluid, the bearing gap having two open ends, at least one fluid dynamic radial bearing and at least one fluid dynamic axial bearing that are disposed along sections of the bearing gap, and sealing means for sealing the open ends of the bearing gap, characterized in that the sealing means comprises an annular sealing gap that has one end connected to the bearing gap and one end connected to an annular reservoir having an outside radius r R , wherein the outside radius r R of the reservoir measured from the rotational axis being larger than the outside radius r D of the sealing gap, wherein the stationary part has a first bearing part, a shaft accommodated in the first bearing part and a second annular bearing part disposed on the shaft, the bearing parts being disposed at a mutual spacing on the shaft, and wherein the second annular bearing part comprises a cylindrical section and a conical section, wherein the conical section forms a slanting surface that borders the annular reservoir and causes bearing fluid contained in the reservoir to flow back into a sealing region.