Patent ID: 7618443

Claim:
A bone attachment device, comprising: a bone attachment member configured to be attached to a bone, the bone attachment member comprising: a central plate body member having a top surfaces, bottom surface and multiple side surfaces, the bottom surface being adapted to abut the bone, the body having at least one borehole extending from the top surface to the bottom surface, wherein the borehole is adapted to receive at least one bone fastener; at least one extension extending outwardly from the central body, wherein the extension defines a periphery of an internal aperture sized to receive at least one rod fixation assembly; a rod fixation assembly in the internal aperture that attaches a first end of an interconnecting fastener to the bone attachment member, wherein a second end of the interconnecting fastener attaches onto a spinal bone; and wherein the rod fixation assembly comprises: an outer saddle member with a cylindrical outer wall having a top surface, a bottom surface that contacts an upper surface of the bone attachment member, and an internal aperture extending from the top to bottom surfaces along the long axis of the outer saddle member, wherein the aperture concentrically contains an inner saddle member, the outer saddle member further containing a slot adapted to receive the interconnecting fastener, wherein the slot extents from one side to an opposite side of the cylindrical outer wall and wherein the slot extends from the top surface towards the bottom surface for a distance that is greater than the diameter of the interconnecting fastener but less than the total distance from the top to bottom surface; and an inner saddle member having a bottom ledge that engages a lower region of the bone attachment member and a cylindrical extension that extends upwardly through the internal aperture of an extension of the bone attachment member, wherein the cylindrical extension has an outer surface that fits concentrically within the internal aperture of the outer saddle member, an open distal end and a threaded internal aperture with threads that extend to the open distal end; and a threaded locking nut that is adapted to fit within the open distal end of the inner saddle member and cooperatively engage the threads of the internal aperture of the inner saddle member.