Patent ID: 9456853
Filing Date: 2016-10-04
CPC Classification: A61B,F16B

Claim Text:
1. A bone anchor assembly comprising: a receiver, the receiver having a top side surface, a front side surface and a back side surface and includes a first pair of upwardly extending arms forming a channel therebetween and mateable with a closure to securely lock a bone anchor with respect to a rod positionable within the channel of the receiver, wherein: each upwardly extending arm having an outward facing horizontal elongated radiused groove about a circumference of the receiver extending to at least one of the front side surface and the back side surface and located a distance from the top side surface, wherein the distance remains constant along a horizontal length of the groove, the grooves of each upwardly extending arm opposed in parallel relation to each other, and wherein the closure is positioned inwardly in the receiver with respect to the grooves and only engages the rod and the receiver.