Patent ID: 7621513

Claim:
An anti-shift collar comprising: an elliptical outer perimeter; a first clipped end and a second clipped end formed in said elliptical outer perimeter; and an inner perimeter including a semi-circular inner perimeter portion having a first semi-circular surface, a second, opposed semi-circular surface, a first polygonal inner perimeter portion and a second polygonal inner perimeter portion, each of the first semi-circular surface and the second, opposed semi-circular surface being connected on one end to said first polygonal inner perimeter portion and on an opposite end to said second polygonal inner perimeter portion such that together said first semi-circular surface, said second, opposed semi-circular surface, said first polygonal inner perimeter portion, and said second polygonal inner perimeter portion entirely form said inner perimeter, and said first polygonal inner perimeter portion and said second polygonal inner perimeter portion formed respectively adjacent said respective first clipped end and second clipped end.