Patent ID: 8685067

Claim:
A compression plate apparatus for stabilizing bone fragments with compression comprising: a. a plate having at least two bone screw holes adapted to accept at least one bone screw each, the plate additionally having at least one elongate hole through the plate; b. a rack comprising rack teeth located along at least one linear edge of the elongate hole; c. a pinion axle assembly comprising a pinion axle having a head portion, a pinion gear having complementary gear teeth for engaging the rack teeth and a lower portion having threads for engaging bone, whereby when a first bone screw is anchored in bone through a bone screw hole in the plate and the pinion axle assembly is anchored in a portion of bone across a fracture from the anchored bone screw through the elongate hole in the plate, then rotation of the pinion gear causes sliding motion of the unanchored bone fragment relative to the plate.