A retainer includes a resilient split band with a transition region and a loading region between its top and bottom edges. The loading region of the split band is provided with a plurality of loading domes which extend inwardly and a plurality of tabs which are located in the transition region of the...http://www.google.com.tw/patents/US5659443?utm_source=gb-gplus-share專利 US5659443 - Split band retainer for radially clamping a disk to a hub in a disk drive
