Magnetorheological fluid compositions and prosthetic knees...

H - Electricity – 01 – F

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H01F 1/44 (2006.01) A61F 2/64 (2006.01) C10M 171/00 (2006.01)

Patent

CA 2524365

The present invention relates in one embodiment to magnetorheological fluids utilized in prosthetic joints in general and, in particular, to magnetorheological fluids utilized in controllable braking systems for prosthetic knee joints. Preferred magnetorheological fluids of the present invention comprises polarizable iron particles, a carrier fluid, and optionally an additive. Preferred additives include, but are not limited to functionalized carrier fluids as well as derivatized fluoropolymers. Preferred carrier fluids include, but are not limited, to perfluorinated polyethers.

L'invention concerne, selon un mode de réalisation, des fluides magnétorhéologiques utilisés dans des prothèses d'articulation en général, et en particulier, des fluides magnétorhéologiques utilisés dans des systèmes de commande de freinage pour des prothèses d'articulations du genou. Les fluides magnétorhéologiques préférés de l'invention comprennent des particules de fer polarisables, un fluide porteur, et éventuellement un additif. A titre d'additifs préférés, on peut citer, entre autres, des fluides porteurs fonctionnalisés ainsi que des fluoropolymères dérivés. A titre fluides porteurs préférés, on peut citer, entre autres, des polyéthers perfluorés.

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