Prosthetic foot
US4892554A · kind A · utility
Inventor
Key dates
| Filing date | Dec 21, 1987 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Dec 21, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2230/0028
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A prosthetic foot includes an ankle member, a heel member and an elongate metatarsal-toe member coupled to each other for relative pivotal movement resisted by resilient pads engaged between the respective members. The undersides of the heel and toe members are concavely arched, the length of the arch duplicating that of a natural foot of the same size, with the center of the arch vertically aligned with the center of gravity of the amputee when in a standing, foot-flat position. The toe member is partially bifurcated at its forward end to provide independently flexible toe sections at the inner and outer sides of the foot, achieving a stable, three-point support matching that of a natural foot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.