Fluid dynamic bearing system

Details Fluid dynamic bearing system Fluid dynamic bearing system

2006-07-26

2009-10-13

Miller, Brian E (Department: 2627)

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

C384S107000, C310S090000

Reexamination Certificate

active

07602582

ABSTRACT:
The bearing system according to the invention comprises a sleeve-shaped first bearing disk having a bore concentric to a rotational axis, a cylindrical shaft disposed in the bore and connected to the first bearing disk, the shaft having a second bearing disk disposed at one end that is arranged at a spacing to the first bearing disk such that an annular disk-shaped space is formed between the first and the second bearing disk. A third annular bearing disk is provided that is disposed in the annular disk-shaped space and is rotatable about the rotational axis, the opposing surfaces of the first, the second and the third bearing disk as well as the shaft being separated from one another by a bearing gap filled with bearing fluid. A radial bearing is provided between the outside circumference of the shaft and the inside circumference of the third bearing disk and marked by the hydrodynamic bearing patterns associated with the circumferential surfaces. A first axial bearing is provided that is formed by the opposing end faces of the first and the third bearing disk and the hydrodynamic bearing patterns associated with these end faces, and a second axial bearing formed by the opposing end faces of the second and the third bearing disk and the hydrodynamic bearing patterns associated with these end faces.

REFERENCES:
patent: 2005/0006969 (2005-01-01), Kull
patent: 2005/0084189 (2005-04-01), Oelsch
patent: 2005/0094906 (2005-05-01), Satoh
patent: 2005/0111766 (2005-05-01), Gotoh et al.
patent: 2005/0140227 (2005-06-01), Kuwert
patent: 2005/0213857 (2005-09-01), Beckers
patent: 2005/0238267 (2005-10-01), Nakamura et al.
patent: 2008/0030103 (2008-02-01), Neumann

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