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US 6,381,092 B1Granted
Spacer rings to compensate for disk warpage
AssigneeKomag, Inc.
InventorShoji Suzuki
Life of this patent
Estimating the term…
Abstract
A disk drive having spacers to compensate for disk warpage is described. The spacers are positioned on opposite sides of a disk with each spacer contacting the disk a different radial position relative to the center of the disk. The offset contact areas result in displaced moments on the disk, with respect to each other, when the spacers are clamped to the disk. The moments generated by the clamped spacers provide a torque on a warped disk to improve its flatness.
Claims10
A spindle assembly, comprising:
- a disk having a concave side and a convex side;
- and
- a plurality of spacers having beveled surfaces coupled to the disk to provide unbalanced moments on the disk, wherein the plurality of spacers comprise:
- a first spacer coupled to the convex side of the disk at a first contact area;
- and
- a second spacer coupled to the concave side of the disk at a second contact area, the first contact area being at a smaller radial distance from a center of the disk than the second contact area.
3 more elements
A disk drive, comprising:
- a disk having a first radial position and a second radial position;
- a first spacer coupled to the disk, the first spacer having an initial area of contact with the disk at the first radial position;
- and
- a second spacer coupled to the disk, the second spacer having an initial area of contact with the disk at the second radial position, the first and the second spacers to generate unbalanced moments on the disk based on the first and the second radial positions, wherein the disk has a concave side and a convex side, wherein the first radial position is less than the second radial position, the first spacer coupled to the convex side of the disk, the second spacer coupled to the concave side of the disk.
1 more element
A spindle assembly, comprising:
- a disk having a concave side and a convex side;
- and
- a plurality of spacers coupled to the disk to provide unbalanced moments on the disk, wherein the plurality of spacers comprise:
- a first spacer coupled to the convex side of the disk at a first contact area;
- and
- a second spacer coupled to the concave side of the disk at a second contact area, the first contact area being at a smaller radial distance from a center of the disk than the second contact area.
3 more elements
Dependencies are inferred from the claim text.