Prosthetic foot having a cantilever spring keel
US4645509A · kind A · utility
112Cited by
15References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1984 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | Jun 11, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2220/0041
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In a prosthetic foot constructed to store strain energy as the foot reacts to the load of the amputee's body during walking, running, jumping, etc., and then to release the stored energy to create foot lift and thrust which complements the user's natural stride, a monolithic cantilever beam made of a hardened polymer is provided as the keel of the foot with an ankle attachment fitting for connection to a standard upper prosthesis. A flexible foamed polymer is molded about the keel, in the shape of a natural foot, to transfer horizontal loads to the keel and to serve as a cosmetic cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.