Orthosis for leg movement with virtual hip pivot
US4566440A · kind A · utility
39Cited by
37References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1984 |
| Grant date | Jan 28, 1986 |
| Priority date | — |
| Expiry date | Feb 9, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2220/16
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A leg exercise orthosis supports the leg of a patient while causing movement of the hip, knee, and ankle joints. The apparatus includes a frame; a femur support; a tibia support which is pivotally connected to the femur support; a double four-bar linkage which connects the frame, the femur support, and the tibia support; and a drive motor connected to the double four-bar linkage. As it is driven by the drive motor, the double four bar linkage guides motion of the femur and tibia supports so that femur support pivots about a virtual pivot axis which essentially corresponds to the pivot axis of the hip joint of the leg.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.