Patent · US Active

Expandable intervertebral cage

US10426634B1 · kind B1 · utility

80Cited by

4References

13Claims

0Family size

Assignee

KING SAUD UNIVERSITY · SA

Inventors

Ayman H. Al-Jazaeri · Riyadh, SA
Amro F. Al-Habib · Riyadh, SA

Key dates

Filing date	Feb 5, 2019
Grant date	Oct 1, 2019
Priority date	—
Expiry date	Feb 5, 2039

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61F2002/30904
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The expandable intervertebral cage includes an upper block and a lower block movable relative to each other. The lower block defines a cam surface and the upper block defines a cam follower surface. Linkages connecting the upper and lower blocks maintain contact between the cam and cam follower surfaces. By rotating a screw, which extends through the lower block, the cam follower surface of the upper block is pushed along the cam surface of the lower block, thus resulting in vertical and horizontal displacement between the upper and lower blocks. Proximal and distal yokes in the blocks define protrusions in the cam and cam follower surfaces. When the cam follower surface slides along the cam surface, the protrusions cause vertical and angular displacement in the upper block, providing distraction, reduction, and lordosis of attached vertebra.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.