Methods for centering disks in a magnetic disk assembly

Details Methods for centering disks in a magnetic disk assembly Methods for centering disks in a magnetic disk assembly

2007-06-26

2007-06-26

Kim, Paul (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S603030, C360S098050, C360S099080, C360S099120, C360S270000, C360S271000

Reexamination Certificate

active

10630265

ABSTRACT:
An apparatus and a method are provided to facilitate building of a disk stack for inclusion in a magnetic disk drive. A spindle is provided which comprises first and second disk contacts. A mechanism is provided to bias an inner diameter of a stack of plural disks toward both the first disk contact and the second disk contact. The spindle may comprise one or a pair of lateral protrusions. The apex of each such spindle lateral protrusions may comprise one or both of the disk contacts. In addition, or alternatively, the inner diameter of a disk, to be inserted over the spindle, may comprise one or a pair of lateral protrusions. The apexes of such disk lateral protrusions may comprise one or both of the first disk contact and the second disk contact.

REFERENCES:
patent: 5101306 (1992-03-01), Johnson
patent: 5333080 (1994-07-01), Ridinger et al.
patent: 5548454 (1996-08-01), Kawakubo et al.
patent: 63167467 (1988-07-01), None
“Investigation of the effect of hard disk drive unbalance on repeatable and nonrepeatable runout”; Hredzak, B.; Guo, G.; Zhang, J.; Power Electronics and Drive Systems, 2003; Nov. 17-20, 2003; pp. 1359-1363.

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