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US 6,669,369 B1Granted
Fluid dynamic bearing secondary capillary seal reservoir
AssigneeSeagate Technology LLC
InventorsRobert Alan Nottingham, Norbert Steven Parsoneault, Jeffry Arnold LeBlanc, Troy Michael Herndon
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Abstract
The present invention relates to the field of fluid dynamic bearings. Specifically, the present invention provides a secondary fluid reservoir for the fluid used in a fluid dynamic bearing in a high-speed spindle motor assembly.
Claims20
An annular bearing cone for a fluid dynamic bearing in a disk drive comprising:
- a bottom, a top and a middle;
- a central annular opening;
- upper walls angling out from the top to the middle;
- lower walls angling out from the bottom to the middle to meet the upper walls;
- and
- grooves of a general axial nature in the upper walls.
3 more elements
A fluid dynamic bearing assembly comprising:
- an annular bearing cone having a central annular opening, a bottom, a top and a middle, upper walls angling out from the top to the middle, lower walls angling out from the bottom to the middle to meet the upper walls;
- a bearing sleeve adjacent the annular bearing cone;
- a shield seal member abutting the bearing sleeve and adjacent the annular bearing cone;
- an annular shield member above the annular bearing cone;
- a first fluid reservoir between the annular bearing cone and the shield seal member;
- and
- a second fluid reservoir between the annular bearing cone and the annular shield member.
4 more elements
A fluid dynamic bearing assembly comprising:
- an annular bearing cone having a central annular opening, a bottom, a top and a middle, upper walls angling out from the top to the middle, lower walls angling out from the bottom to the middle to meet the upper walls;
- a bearing sleeve adjacent the annular bearing cone;
- a shield seal member abutting the bearing sleeve and adjacent the annular bearing cone;
- an annular shield member above the annular bearing cone;
- a first fluid reservoir between the annular bearing cone and the shield seal member;
- a second fluid reservoir between the annular bearing cone and the annular shield member;
- and
- capillary path means between the first fluid reservoir and the second fluid reservoir.
5 more elements
Dependencies are inferred from the claim text.