Hinge assembly for an orthopedic knee brace and knee brace incorporating the hinge assembly

A hinge assembly (16, 18) for an orthopedic splint (10) comprising: an upper support arm (24); a lower support arm (30); a hinge plate (52, 62); and first and second gear elements (56, 58) pivotally connected to the hinge plate; wherein the first gear element is coupled to rotate with the upper support arm and the second gear element is coupled to rotate with the lower support arm; characterized in that: the first gear element has a hinge surface (76) adjacent to a surface of the upper support arm; and the second gear element has a hinge surface (76) adjacent to a surface of the lower support arm;