Patent ID: 8824098

Claim:
A disk clamp for clamping an information storage disk to a rotating spindle using a fastener in a disk drive, the disk clamp comprising: a deflection portion that is annular and conical in shape and having a substantially straight cross section, the deflection portion having a material thickness, an outer extent, and an inner extent that is offset from the outer extent by a height measured parallel to an axis of rotation of the disk clamp, the height being in the range 2 to 2.6 times the material thickness, wherein the inner extent further comprises an inner edge disposed at an inner radius of the disk clamp, the inner edge being fashioned to be coupled to the fastener with the fastener extending radially closer to the axis of rotation than the inner edge, the inner edge having a substantially cylindrical lip that has a lip thickness that is greater than the material thickness; and a disk contact portion that is disposed radially outboard from the deflection portion, the disk contact portion including a first curvature radially outboard of the outer extent that departs from a projection of the deflection portion, the first curvature being characterized by a concave shape with a radius of curvature no greater than 10 mm, and a bottom surface for contacting the information storage disk, wherein the height is measured from the outer extent and away from the bottom surface.