Back to results
US 2022/0160522 A1Published application
Computer-Controlled Ankle-Foot Prosthesis with Series J-Spring Actuation
AssigneeMassachusetts Institute of Technology
InventorsHugh M. Herr, Matthew Lawrence Handford, Christopher Charles Williams, Matthew Eli Carney, Daniel Visan Levine
Life of this patent
Estimating the term…
Abstract
An ankle-foot prosthesis comprises a foot structure having a foot keel leaf spring, a heel leaf spring, and an upper J leaf spring above the keel leaf spring. An ankle bearing block is mounted to the keel leaf spring and a shank shell is mounted to the ankle bearing block. A shank interface mounts to the shank shell. A processor controlled active element extends along an axis between the shank shell and the upper leaf-spring.
Claims16
An ankle-foot prosthesis comprising:
- a foot structure comprising an anterior portion and a foot keel leaf spring extending posteriorly from the anterior portion;
- an ankle-bearing block mounted to and above the foot keel leaf spring;
- a shank shell mounted to and above the ankle-bearing block at an ankle joint;
- a prosthetic shank interface mounted to the shank shell;
- an upper leaf spring extending posteriorly from the anterior portion of the foot structure above the keel leaf spring past the ankle-bearing block;
- a processor controlled active element extending along an active element axis between the shank shell and a posterior portion of the upper leaf spring and coupled to the shank shell at a shank shell rotational bearing and to the upper leaf spring at an upper leaf spring rotational bearing.
3 more elements
Dependencies are inferred from the claim text.