Patent ID: 6255750
Filing Date: 2001-07-03
Classification: G11B

Abstract:
A disc drive motor spindle assembly for reducing the effects of disc flutter in a disc drive, the assembly comprising:a disc drive motor spindle having a cylindrical hub portion defining an outer surface and a bottom flange having a top side defining a chamfered edge, the bottom flange extending beyond the outer surface of the hub portion;an annular information storage disc having a central aperture, a top surface and a bottom surface mounted on the cylindrical hub portion;a disc clamp having a tubular sidewall, the tubular sidewall having a bottom side defining a chamfered edge, the disc clamp on the cylindrical hub portion extending radially outward beyond the outer surface of the hub portion onto a portion of the annular information storage disc, wherein the disc clamp is secured to the cylindrical hub portion to clamp the annular information storage disc between the disc clamp and the bottom annular flange; anda damping ring spaced a predetermined distance from the outer surface of the cylindrical hub portion contacting the annular information storage disc and one of either the disc clamp or the bottom annular flange for absorbing vibrational energy from the annular information storage disc.