Patent ID: 6212030
Filing Date: 2001-04-03
Classification: B23H,G11B,Y10T

Abstract:
A clamping structure for clamping n disks, wherein n is greater than 3, comprising:a spindle hub for receiving said disks and having a flange at a first end thereof, said flange having a first protruding portion, said disks being stacked on said first protruding portion;n-1 spacers interposed between adjacent ones of said n disks, said n-1 spacers including an uppermost spacer and a lowermost spacer; anda clamp ring fixed to a second end of said spindle hub, said clamp ring having a second protruding portion for biasing said disks toward said flange of said spindle hub,wherein only an outer circumference of said uppermost spacer and an outer circumference of said lowermost spacer include an annular groove.