Patent ID: 8840669

Claim:
A variable height intervertebral device comprising: a cylindrical body having a first end and a second end opposite the first end; a first disk threaded to the first end of the cylindrical body and a second disk mounted to the second end of the cylindrical body; means for rotating the cylindrical body whereby the first disk translates along the cylindrical body to vary a height of the device; a plurality of pins mounted to one of the first disk and the second disk, and a plurality of sleeves mounted to the other of the first disk and the second disk, wherein the plurality of pins are slidably engageable with the plurality of sleeves, the plurality of pins and the plurality of sleeves inhibiting the first disk and the second disk from rotating when the means for rotating rotates the cylindrical body; a means for limiting translation of at least the first disk; a housing surrounding the cylindrical body and a first vertebra engagement member mounted to the first disk; and wherein the means for limiting translation comprises at least one recess in the housing and at least one projection on the first vertebra engagement member positioned to engage the at least one recess in the housing.