Patent ID: 9492207
Filing Date: 2016-11-15
CPC Classification: A61B

Claim Text:
1. A vertebral fixing device for securing a rachidian vertebra to a cylindrical rod, comprising a fixing body on the rod, a flexible strip for linking said vertebra with the fixing body and adjustable means for blocking the flexible strip on the fixing body, the fixing body being of U-shaped cross section, for passage of the rod between a bottom wall of the U and the adjustable blocking means, said adjustable blocking means being formed by a link part linking facing ends of two branches of the U, said branches each comprising a facing void situated on a side of the bottom wall of the U, having a bottom above the bottom wall of the U, namely a first void with a bottom above the bottom wall of the U for passage of free ends of the flexible strip and a second void having a bottom above the bottom wall of the U on the other side for passage of the strip specifically for forming a fixing loop on the vertebra, wherein: the body is formed of a rigid single part; the link part is formed by a clamping screw provided with a head for passage into a first branch of the U, said head including a tapered part arranged to engage and progressively compress the rod against the bottom wall of the U as it is screwed such that the rod is positioned at least partially below said respective bottoms of said first and second voids, and thus progressively compress any two flexible strip portions passing between said first and second voids against the bottom wall of the U an amount corresponding to an advancement amount of the clamping screw, said clamping screw further having an end for screwing onto a second branch of the U opposite the first; and the head of the clamping screw also includes a shoulder designed to abut with an outer face of the first branch of the U, said shoulder being configured in relation to the tapered part such that as the screw is advanced, and with said flexible strip portions positioned between the rod and the bottom wall of the U, said tapered part engages the rod to progressively press the flexible strip portions between the rod and the bottom of the U, substantially only up to a point that the shoulder abuts with the face of the first branch of the U, and without substantial deflection of either of the two branches of the U.