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US 6,608,733 B2Granted
Two-plane balance for spindle motors
AssigneeSeagate Technology LLC
InventorJohn W. Elsing
Life of this patent
Estimating the term…
Abstract
In a spindle hub configured for rotation about an axis, through holes extend from a first end of the spindle hub to a second end of the spindle hub. The through holes are generally parallel to the axis. A method of achieving two-plane balance of a disc pack assembly by positioning one or more weights in one or more of the through holes and retaining the weight in the position, such that it is possible to access each weight from the top of the spindle hub.
Claims8
A spindle hub for receiving at least one disc configured for rotation about an axis, the spindle hub comprising:
- a first end;
- a second end;
- a plurality of through holes on the spindle hub such that the through holes extend from the first end to the second end in a direction generally parallel to the axis, wherein said through holes extend at least an axial distance that is defined relative to a position above a highest of said at least one disc and a position below a lowest disc of said at least one disc;
- at least one weight in one particular of the plurality of through holes, wherein the weight is configured such that the weight can be positioned in the particular through hole at a stop;
- and
- a retainer in the particular through hole configured to retain the weight in a position between the retainer and the stop.
3 more elements
A disc drive comprising:
- a disc pack assembly having a spindle hub for receiving at least one disc and for rotation about an axis;
- and
- means for balancing the disc pack assembly, wherein said means comprises a plurality of through holes on the spindle hub such that the through holes extend from a first end to a second end in a direction generally parallel to the axis, wherein said through holes extend at least an axial distance that is defined relative to a position above a highest of said at least one disc and a position below a lowest of said at least one disc.
Dependencies are inferred from the claim text.