Expandable intervertebral implant
US11622864B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2020 |
| Grant date | Apr 11, 2023 |
| Priority date | — |
| Expiry date | Jun 25, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/443
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An expandable intervertebral implant includes a superior plate having a proximal end, an opposing distal end, and a threaded first hole. An inferior plate has a proximal end, an opposing distal end, and a first bore, the inferior plate at least partially bounding an elongated channel that communicates with the first bore. A first lift screw includes a gear wheel rotatably received within the first bore of the inferior plate and a threaded stem projecting from the gear wheel and being threaded into the first hole of the superior plate. A drive screw is rotatably disposed within the channel of the inferior plate, the drive screw having a worm that engages with the gear wheel such that rotation of the drive screw facilitates rotation of the first lift screw which in turn facilitates movement of the superior plate relative to the inferior plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.