Patent ID: 8906060

Claim:
A bone anchor comprising: a rivet having a proximal end and a head distal to an elongate body, said rivet further having a collar disposed proximal of said head; a sleeve having an internal channel for slidably receiving the body; and an expansion nut having a channel therethrough for slidably receiving said body, proximal of said sleeve; the rivet, sleeve and expansion nut being so arranged such that movement of the rivet from a first position to a second position causes the sleeve to cam over the rivet head and said expansion nut until said expansion nut abuts said collar, forcing the sleeve to expand into a wall of a bone hole; said sleeve having a shoulder extending radially inward from an inner surface of the internal channel in a region inboard of a proximal end of said sleeve, the shoulder engaging a trailing edge of said expansion nut after expansion of said sleeve.