Distraction apparatus
US6203548A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 7, 2000 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Jan 7, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/606
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to a distraction apparatus for holding a fracture during the healing process. The apparatus includes screws or pins for insertion into a bone at points proximal and distal relative to a fracture site, and a pair of springs which can be connected externally between the screws or pins at spaced positions thereon. The springs act as an extension spring and a compression spring respectively between the screws or pins. The invention is characterized in that the springs are connected at the spaced positions at such distances relative to the bone that the springs will exert moments of force in order to obtain a desired torque load at the fracture site.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.