Unilateral fixator

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/64 (2006.01) A61B 17/56 (2006.01) A61B 17/66 (2006.01) A61B 19/00 (2006.01)

Patent

CA 2499373

A unilateral external fixator device (300) that allows for gross manipulation and fine adjustment of deformities in six degrees of freedom. The device (300) may comprise a strut assembly and two compound movable joints, one at each end of the strut assembly (150, 160). One compound movable joint (110) may comprise two revolute joints (302, 304), each containing a gear reduction mechanism (401) and may rotate about the strut (150). The second compound movable joint (120) may contain two revolute joints (306, 308), each containing a gear reduction mechanism (401), and may move along the length of the strut assembly (150, 160). The gear reduction mechanisms (401) may comprise helical spline assemblies (420, 440, 460, 465) that allow for gross and fine adjustment of the fixator (300).

La présente invention concerne un dispositif de correction externe unilatéral qui permet une manipulation grossière et un réglage fin de déformations avec une marge de manoeuvre de six degrés. Ce dispositif comprend un ensemble étançon et deux articulations mobiles combinées, une à chaque extrémité de l'ensemble étançon. Une articulation mobile combinée peut comprendre deux articulations tournantes, chacune d'elles contenant un mécanisme de réduction à pignons et pouvant tourner autour de l'étançon. La seconde articulation combinée peut contenir deux articulations tournantes, chacune contenant un mécanisme de réduction à pignons et pouvant se déplacer sur la longueur de l'ensemble étançon. Les mécanismes de réduction à pignons peuvent comprendre des ensembles cannelure hélicoïdale qui permettent d'effectuer des réglages grossiers et fins de ce dispositif de correction.

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