Patent ID: 8715326
Filing Date: 2014-05-06
Classification: A61B

Abstract:
1. A bone fusion device comprising: an anchor assembly, the anchor assembly having a tubular cylindrical body at least a portion of which is covered by external threads adapted to engage hard tissue, the anchor assembly having a first end adapted to engage hard tissue and a second end adapted to rotationally couple with a compressor assembly; a compressor assembly, the compressor assembly having a tubular cylindrical body at least a portion of which is covered by external threads adapted to engage hard tissue, the compressor assembly having a first end adapted to rotationally couple with the anchor assembly and a second end having a lumen adapted to admit a tool, the external threads on both the anchor assembly and the compressor assembly having substantially the same pitch and diameter; and an articulating linkage for rotationally coupling the anchor assembly to the compressor assembly, wherein the articulating linkage comprises a locking feature such that the anchor assembly and the compressor assembly become locked in a fixed orientation when a tensile force is exerted on the anchor assembly and the compressor assembly after they are coupled, wherein the articulating linkage rotationally couples one end of the compressor assembly to the anchor assembly so that the compressor assembly may rotate about the anchor assembly within a semi-spherical zone, so as to have three degrees of rotational freedom, and translate axially, so as to have one degree of translational freedom, said device further comprising an access port assembly that threadably attaches to the second end of the compressor assembly.