Shape optimization for prosthetic feet
US11607325B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2020 |
| Grant date | Mar 21, 2023 |
| Priority date | — |
| Expiry date | Dec 4, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/6671
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A passive prosthetic foot enables a below-knee amputee to walk with near able-body walking motions. The prosthetic foot includes a resilient heel that enables the heel to strike a walking surface more softly than in the prior art and more accurately transition the leg from swing phase to stance phase. The prosthetic foot is modeled generally as a wide Bézier curve, and the foot is characterized according to a set of at least 12 variables, including h, C1d, C2x, C2y, C2d, C3x, C3y, C3d, C4x, C4d, C5d and C6d, where C3y is heel size, C4x is heel geometry and C6d is curve intersection location. The variables are optimized to minimize a difference between a normal lower leg trajectory during gait and a modeled trajectory that includes the prosthetic foot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.