Hub and spindle assembly
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United States of America Patent
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Apr 8, 2014
Grant Date -
Mar 14, 2013
app pub date -
Sep 14, 2012
filing date -
Jun 24, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A rotating hub and fixed spindle assembly with first and second fluid dynamic journal bearings and first and second fluid dynamic thrust bearings for a disc drive memory system has a pump seal and a radial ring seal at a first axial terminus for lubricant containment, and a capillary seal and a labyrinth seal at a second axial terminus for lubricant containment and storage. Lubricant fluid pressure differences between first and second seals are minimized through one or more lubricant fluid communicating channels in the hub assembly, in order to minimize lubricant fluid loss through a seal. Lubricant fluid can also be purged of any air bubbles by lubricant fluid circulation through the channel.
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