An annular shaft flange that can be positioned along the length of a shaft and secured to the shaft to prevent movement of an article along the length of the shaft. The annular shaft flange includes a pair of nesting ends that are attachable to each other using a mechanical interlocking member....http://www.google.fr/patents/US6935806?utm_source=gb-gplus-shareBrevet US6935806 - Hinged annular shaft flange
