US Patent 7942901 Connector apparatus

A connector apparatus for linking spinal rods comprises a connector body having a C-shaped engagement portion contiguous a closed engagement portion. The engagement portions each include an opening to receive a rod, each opening including an inner contact surface to engage the rod. Additionally, each engagement portion includes a through-hole to receive a screw, the through-holes being aligned substantially perpendicular to a longitudinal axis of the connector body. The through-hole and screw corresponding to the C-shaped engagement portion are offset from the corresponding rod when the rod is positioned in the corresponding opening. Additionally, the screws are advanced through the through-holes to urge the rods against the inner contact surfaces to engage the connector body to the rods. The connector apparatus creates a low profile, top tightening fixation system, providing a stable, rigid transverse connection between adjacent spinal rods.