Patent ID: 9510955
Filing Date: 2016-12-06
CPC Classification: A61F

Claim Text:
1. A device comprising: a caudal plate configured to be positioned adjacent a first vertebral endplate within an intervertebral disc space; a cephalad plate configured to be positioned adjacent a second vertebral endplate within the intervertebral disc space; at least one sidewall rotatably coupled to both the caudal and cephalad plates, wherein the at least one sidewall having an upper sidewall portion having a first meeting edge surface coupled by a hinge element to a second meeting edge surface of a lower sidewall portion, wherein when in a low profile configuration the hinge element folds inward, and when fully expanded in at least a first dimension to a high profile configuration, the hinge element is restricted from achieving an on-center and an over-center rotational position around the hinge element such that the device is biased to collapse inwardly upon compression loading; and wherein when the device is in the high-profile configuration the upper sidewall portion and the lower sidewall portion are aligned under-center relative to each other and angled towards an interval volume, and the first meeting edge surface abuts the second meeting edge surface thereby preventing further pivoting of the hinge element beyond an under-center rotational position.