Patent ID: 11955139
Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 5:
6. A disk spindle assembly, the spindle assembly comprising:
a hub; and
a hub flange extending radially from the hub and configured to apply a clamping force to secure disk media to the hub, the hub flange comprising:
a top side and a bottom side, and
multiple protrusions extending from a surface of the top side and configured to contact a disk medium at multiple respective contact positions of the disk medium in response to application of a clamping load;
wherein:
each of the multiple protrusions comprises an annular protrusion circumscribing the hub, and
the multiple protrusions comprise an inner annular protrusion having a first center height and an outer annular protrusion having a second center height greater than the first center height.