Prosthetic limbs with means capable of reducing torque in the initial period of bend of knee joint
US8529634B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2007 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | May 27, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2220/0033
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A technology for making the sensation at use of prosthetic limbs utilizing a hydraulic cylinder and a spring cylinder as comfortable as at use of those utilizing a pneumatic cylinder and further for improving walk following properties. In particular, the arrangement of a hydraulic cylinder or a spring cylinder, or the like, is specified. Accordingly, the resistance produced by the hydraulic cylinder or spring cylinder in accordance with an increase of knee angle is increased, The first torque T1 at the first stage of initial period of bend of the knee joint is made small, while the second torque T2 at the second stage of final period of the further advanced bend of knee joint is made large, thereby satisfying a relation of T1≧T2, as different from conventional ones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.