Patent ID: 8685098

Claim:
An intervertebral implant comprising: a body portion comprising a first end, a second end, a first side portion connecting the first end and the second end, and a second side portion connecting the first end and the second end, the first end, second end, first side portion and second side portion defining a central opening; a first endplate comprising an upper side, a lower side, a first ramped portion, a second ramped portion, the first and second ramped portions extending from the lower side into the central opening; a second endplate comprising an upper side, a lower side, and third and fourth ramped portions, the third and fourth ramped portions extending from the lower side into the central opening; and a translation member comprising an expansion portion, at least a portion of the translation member is received within the central opening, the expansion portion comprising a first, a second, a third and a fourth angled surface, the first and second angled surfaces engaging the first and second ramped portions of the first endplate, the third and fourth angled surfaces engaging the third and fourth ramped portions of the second endplate; wherein movement of the translation member in a first direction from the first end of the body portion towards the second end of the body portion causes the first and second endplates to move in a direction away from the body portion and the movement of the translation member from the second end of the body portion to the first end of the body portion in a second direction causes the first and second endplates to move in a direction towards the body portion, and wherein the movement of the translation member in the first direction moves the first and second angled surfaces in the same direction along the first and second ramped portions of the first endplate and the third and fourth angled surfaces along the third and fourth ramped portions of the second endplate wherein the first and second angled surfaces are at a first distance from each other when the first endplate is in an unexpanded position and at a second distance at an expanded position, wherein the first and second distances are equal.