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.

Title
Magnetorheological fluid compositions and prosthetic knees utilizing same
Application Number
10/722313
Publication Number
20040217324
Application Date
November 25, 2003
Publication Date
November 4, 2004
Inventor
Stephen W Prince
Mission Viejo
CA, US
Michael W Lindsay
Mission Viejo
CA, US
Ronald J Lukasiewicz
Carlsbad
CA, US
Michael Lars Palmer
Ladera Ranch
CA, US
Charles R Bisbee
Mission Viejo
CA, US
Henry Hsu
Aliso Viejo
CA, US
Agent
Knobbe Martens Olson & Bear
CA, US
IPC
H01F 01/44
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