Patent ID: 8197546

Claim:
A corpectomy device comprising an inner cylindrical sleeve having a first and second end and cylindrical shaped side wall there between and an outer cylindrical sleeve having a first and second end and a cylindrical shaped side wall there between; the external diameter of the inner sleeve being less than the inner diameter of the outer sleeve; whereby the first end of said inner cylindrical sleeve is telescopically received within the first end of the outer cylindrical sleeve; said cylindrical side wall on said inner sleeve including a plurality of parallel circumferential locking grooves on an external surface of said cylindrical side wall; said side wall on said outer sleeve including a plurality of locking pads located about the circumference of said outer sleeve, each of said locking pads configured to engage at least one circumferential groove on the cylindrical side wall of said inner sleeve; said outer cylindrical sleeve including an annular circumferential locking ring positioned on the outer cylindrical sleeve with a first guide ring, said first guide ring is a one piece ring having an outer wall and an inner wall, said inner wall is smooth in circumference, said annular circumferential locking ring is positioned between said first guide ring and a second guide ring, wherein the annular circumferential locking ring and the first and second guide rings each include tabs which provide a visual indication that the locking ring is either in the first or second position, and is mounted for rotary movement with respect to said outer cylindrical sleeve, and is rotatable between two positions; wherein a first position disengages the locking pads from at least one of the circumferential grooves and allows telescoping motion between the inner cylindrical sleeve and the outer cylindrical sleeve wherein a second position engages at least one of said circumferential grooves and locks the inner and outer cylindrical sleeves in a fixed telescopic relationship.