Prosthetic component with pneumatic device for knee articulation
US5904721A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1996 |
| Grant date | May 18, 1999 |
| Priority date | — |
| Expiry date | Jun 6, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/5073
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A prosthetic component with a pneumatic device for knee articulation formed of an upper part adapted to support a socket element for a stump of a thigh, and a lower part intended to receive a tube extended by an ankle and foot. The two parts are connected to each other by an assembly of pivoted links forming a deformable prism. Movement of the two parts between two stable positions of complete extension and flexure, about the variable axis of rotation defined by these connections, is controlled by a pneumatic cylinder having an upper chamber and a lower chamber separated by a piston and communicating with each other by an air duct with adjustable flow. In each of the stable positions, the pressure of air in the chambers is greater than 1 bar and is preferably between 4 and 7 bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.