Spinal implant connection assembly
US6562038B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 2000 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Mar 15, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7041
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A variable angle connection between a spinal rod and a vertebral anchor with a clevis to attach to the vertebral anchor, permitting the vertebral anchor to be longitudinally offset from the connecting point on the rod. The connection assembly has a bolt with a stop disposed near one end of the bolt and an aperture for receiving a portion of the spinal implant rod at the other end. The assembly also has a clevis. The clevis defines a bore to hold a portion of the vertebral anchor and the ears of the clevis have holes through which the bolt is located with the ears positioned between the stop and aperture of the bolt. The assembly also has a rod interface washer positioned over a portion of the bolt, between the aperture of the bolt and the inside ear of the clevis. The rod interface washer is partly movable between the aperture of the bolt and the clevis, but the washer is fixed against rotating in relation to the bolt. Finally, the assembly also includes a screw that is threads into the side of the bolt and continues into the aperture of the bolt. The screw is used to push the rod toward the vertebral anchor so that the inside and outside ears of said clevis are pressed together an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.