Device for setting a spine
US5476464A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1994 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Feb 18, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/8685
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention relates to a device for setting a spine having damaged vertebrae, comprising an anchoring element including a shaft portion (16) to be attached to spaced vertebrae, the free end of said anchoring element including a slot (24) for receiving a distracting or, respectively, compressing bar (40) and a cap nut (42) to be screwed onto an outer thread (32) provided in the region of the receiving slot to urge an axial fixing portion (44) towards the bar received in said receiving slot. The invention is defined in that the receiving slot (24) is formed in a separate swivel head (20) including an inner end in the shape of a ball receiving portion (23) which has an aperture (28) through which said shaft portion (16;52) of the anchoring element (10;50) extends, wherein the diameter of the shaft portion adjacent said aperture is smaller than that of said aperture ( 28 ), and that a ball head ( 14;56 ) is provided at the end of the shaft portion ( 16;52), said ball head having a diameter larger than that of said aperture (28) and said ball head (14;56) in the ball receiving portion (23) entering the terminal region of said receiving slot (24) .
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.