Orthopaedic device with locking barrel
US7670341B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2005 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | Mar 5, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/8047
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A bone fixation assembly includes a side plate for mounting on a bone and a barrel for receiving a portion of a lag screw, and configured to be inserted into a hole in the side plate. A mechanical spring located at the upper portion of the barrel biases a first detent portion toward a locking position with a second detent portion located on the side plate such that rotation of the barrel within the hole from a first position to a second position causes a compressing portion on the detent portion to contact a compressing portion on the second detent portion thereby compressing the mechanical spring so as to allow the barrel to be rotated to a third position wherein the mechanical spring is allowed to bias the first detent portion into the locking position such that a retaining portion of the first detent is adjacent to a retaining portion of the second detent and rotation of the barrel with respect to the side plate is restricted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.