Patent ID: 6222700
Filing Date: 2001-04-24
Classification: G11B

Abstract:
A disc mounting system for mounting discs on a hub of a spindle motor in a disc stack, the disc mounting system comprising:a radially extending disc mounting flange at a lower end of the hub supporting a lowermost disc in the disc stack;a disc spacer interposed between adjacent discs in the disc stack to establish a desired spacing between the adjacent discs;a disc clamp, bearing against an uppermost disc in the disc stack and exerting an axial clamping force expressed through the discs and disc spacers to the disc mounting flange; anda compression spring member disposed about the hub between adjacent said discs in the disc stack, the compression spring member comprising upper and lower peaks which axially engage chamfers at a bore of each said disc to exert a radially directed force and an axially directed force on each said disc maintaining a fixed concentric relationship of each said disc relative to the hub.