Orthopedic fixation device with zero backlash and adjustable compliance, and process for adjusting same
US8202273B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Apr 28, 2008 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Apr 20, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/62
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An orthopedic fixator for positioning a first element relative to a second element with precision and with controlled compliance which can be adjusted during the healing process. One embodiment comprises a first frame for attachment to the first element, a second frame attached to the first frame through a plurality of adjustable effective length struts, and a third frame for attachment to the second element, wherein the third frame is compliantly attached to the second frame. A preferred embodiment comprises adjustable length preload elements to apply unidirectional forces between the first and second frames so as preload the adjustable effective length struts and substantially reduce the positional tolerance. An alternative embodiment comprises adjustable spring elements allowing the compliance of the attachment of the third frame to the second frame to be adjusted at various points in the healing process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.