Spinal hook
US4567884A · kind A · utility
Inventor
Key dates
| Filing date | Dec 1, 1982 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | Dec 1, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7076
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
This invention provides a spinal hook comprising a body having a rod receiving bore therethrough, a connecting portion and a shoe portion, the connecting portion extending along a plane approximately normal to the axis of the base and the shoe portion extending in a plane from the connecting portion and terminating in a tip on one end and joined to the connecting portion on the other end. Preferably, the side of the body facing the shoe portion has a convex curved outer surface to allow a closer fit to a vertebra to which the hook is attached. In preferred embodiments of the invention, the tip of the shoe is disposed closer to the body than the remainder of the shoe by either forming an acute angle between the shoe and the connecting portion or bending the tip of the shoe. The shoe may be tapered in both width and thickness and the connecting portion may be tapered in width from the body to the shoe to provide better fit between the hook and the vertebrae. The body is provided with one non-round slot or a plurality of holes on at least one side thereof to facilitate gripping and insertion of the hook. A holder adapted for use in connection with the present hook is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.