Patent ID: 6356409
Filing Date: 2002-03-12
Classification: F16F,G11B

Abstract:
A hard disk drive assembly, comprising in combination:a base; a motor having a rotatable spindle with an axis mounted to the base; a plurality of disks mounted to the spindle; an actuator pivotally mounted to the base for selectively interacting with the disks; a balancing mechanism coaxially mounted to the spindle and having an outer ring and an inner ring, each of the rings having an imbalance and being independently rotatable relative to the spindle and to each other; wherein an imbalance in the spindle is counterbalanced by the balancing mechanism by rotating the rings relative to the spindle and to each other; and wherein each of the rings has a consistent cross-sectional profile such that the inner radial surface of the outer ring nests and interlocks with an outer surface of the inner ring to prevent axial motion therebetween but allow angular reorientation of the rings.