Magnetorheological fluid compositions and prosthetic knees utilizing same
First Claim
1. A magnetorheological fluid comprising iron particles and a fluid component, wherein the fluid component comprises a carrier fluid and an additive;
- wherein the additive comprises a parafluoropropene and oxygen polymerized amide derivative and/or a functionalized perfluorinated polyether fluid.
3 Assignments
0 Petitions
Accused Products
Abstract
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.
95 Citations
46 Claims
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1. A magnetorheological fluid comprising iron particles and a fluid component,
wherein the fluid component comprises a carrier fluid and an additive; wherein the additive comprises a parafluoropropene and oxygen polymerized amide derivative and/or a functionalized perfluorinated polyether fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A magnetorheological fluid comprising iron particles and a fluid component used in combination with a prosthetic knee;
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wherein the fluid component comprises a carrier fluid and an additive;
wherein the additive comprises a parafluoropropene and oxygen polymerized amide derivative and/or a functionalized perfluorinated polyether fluid. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification