Taper-locking fixation system

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/70 (2006.01)

Patent

CA 2675037

A fixation system is designed to lock an elongated member within a housing member, permitting positional and/or orientational adjustment of the elongated member prior to locking. The system includes a housing member, a slotted spherical collet, an elongated member, and may include a tapered wedge, which may be a discrete component or formed as part of the elongated member. The housing member and/or elongated member may be implantable. The elongated member may be positioned in the wedge, the wedge in the collet, and the collet in the housing such that when compression force is applied to the wedge and the collet, the wedge contracts about the elongated member and the collet expands to engage the housing, thus locking the elongated member relative to the housing. The collet may have a tapered channel with a degree of taper equal to the tapered wedge. The collet may have multiple slots to allow uniform radial expansion and compression.

La présente invention concerne un système de fixation conçu pour bloquer un élément allongé dans un élément de boîtier, tout en permettant un réglage de position et/ou d'orientation de l'élément allongé avant blocage. Ce système comprend un élément de boîtier, un collet sphérique à fentes, un élément allongé et éventuellement une cale conique qui peut être un composant discret de l'élément allongé ou faire partie de celui-ci. Il est possible d'implanter l'élément de boîtier et/ou l'élément allongé. L'élément allongé peut être placé dans la cale, la cale dans le collet et le collet dans le boîtier, de manière que lors de l'application d'une force de compression sur la cale et le collet, la cale se contracte autour de l'élément allongé et le collet se dilate pour entrer en prise avec le boîtier, bloquant ainsi l'élément allongé par rapport au boîtier. Le collet peut présenter un canal conique avec un degré de conicité identique à celui de la cale conique. Le collet peut comporter plusieurs fentes qui permettent une dilatation et une compression radiales uniformes.

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