Patent ID: 8475500

Claim:
An anchor device for anchoring an elongated rod to the spine, comprising: a fastener having a bone engaging portion and a head, said head defining a socket; an insert captively retained in said socket and configured for swiveling therein, said insert having a first configuration for insertion into said socket and a second configuration different from the first configuration for captively retaining said insert in said socket; a yoke having a rod receiving channel and integrally fastened to said insert for common articulating movement with said insert relative to said fastener, said yoke including a stem, said yoke and stem being formed as one piece, said stem defining a cavity and being integrally fastened to said insert; and a friction member comprising a spring member for applying a force between said insert and said socket to frictionally maintain said yoke in a movable position relative to said fastener, wherein said spring member is disposed in said stem cavity.