Orthosis with distraction through range of motion
US5285773A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1991 |
| Grant date | Feb 15, 1994 |
| Priority date | — |
| Expiry date | Apr 24, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2005/0153
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An orthosis for stretching tissue that limits compressive forces on the soft tissue around a joint during movement of the joint. The orthosis includes two relatively pivotable cuff arms with a cuff on each arm. The cuffs clamp onto the body portions on either side of the joint. The pivot axis of the cuff arms is spaced from the pivot axis of the joint, so that movement of the cuff arms to extend the joint results in distractive forces being applied to the joint. The cuffs are selectively moved on the cuff arms, during extension and flexion, to provide the proper amount of distractive forces to the joint and to limit compressive forces on the joint. A mechanical advantage is gained through the use of a gear drive mechanism for transmitting to the joint the force applied by the patient. This allows the orthosis to be relatively small and light weight. The orthosis also provides a portable system for continuous passive motion therapy for a joint. The orthosis may be operated by a manual plus electric drive cycling it between extremes of motion. Provision is made for monitoring the range of motion or the force applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.