Measuring and testing – With fluid pressure
Reexamination Certificate
2005-06-21
2005-06-21
Williams, Hezron (Department: 2856)
Measuring and testing
With fluid pressure
C073S010000
Reexamination Certificate
active
06907769
ABSTRACT:
Embodiments of the invention generally provide a method for detecting air contamination within a fluid dynamic bearing used with a disc drive. In one embodiment, the invention provides a method to determine the amount of air contamination with hydrodynamic fluid by comparing the differential displacement of the fluid dynamic bearing between vacuum and non-vacuum conditions. In another aspect, the invention provides an air-contamination detecting apparatus adapted to detect air contamination within the fluid of a fluid dynamic bearing. In another aspect, the invention provides a method to determine air contamination within fluid dynamic bearings using the change in fly height of one or more probes disposed above the surface of a rotating surface of the disc drive.
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Aiello Anthony Joseph
Kloeppel Klaus Dieter
Fayyaz Nashmiya
Seagate Technology LLC
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