Multiple expansion stage interbody devices
US11116644B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2019 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Dec 2, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00011
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An example expandable interbody device can include a structural body having an upper endplate and a lower endplate. The device can include at least one wedge block and at least one linkage block arranged between the upper and lower endplates. The linkage block can include a plurality of linkages and a shear pin disposed at a respective proximal end of each of the linkages. The device can include a drive screw extending through the wedge and linkage blocks. The drive screw can be configured to rotate and drive the wedge block to expand the upper and lower endplates of the structural body from the closed position to an intermediate position. Additionally, the drive screw can be further configured to rotate and drive the linkage block to expand the upper and lower endplates of the structural body from the intermediate position to an open position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.