Patent ID: 8764800

Claim:
A bone displacement device for displacing bones relative to one another in a living mammal, the device comprising: first and second support units each comprising a support portion and a support part, the support part having external threads and being supported by the support portion, wherein the first support part of the first support unit includes a pin in pivotal cooperation with a bearing provided in the second support part, a distance unit having controlled displacement means for controlling displacement between the support units with respect to one another to alter the degree of separation of the bones; at least two elongated engagement elements spaced apart from one another for engagement with at least two separate bones, the engagement elements comprising at least a first engagement element and a second engagement element each having a substantially longitudinal axis, wherein each engagement element is housed by a respective support part, and each engagement element extends at a respective angle with respect to a straight line between the support units, and angle-altering means provided with at least one of the support units configured to accurately alter the angle between the engagement elements and thus, the associated bones, the angle-altering means comprising an actuating unit maneuverable to adjust the angle via the respective support part, wherein the actuating unit includes a setting element comprising a cam arranged on the first support part and configured to act against a surface portion on the second support part, and a sleeve having an end surface and internal threads for engagement with the external threads of the support part, wherein the sleeve is configured to axially displace upon rotation along the support part and thereby correspondingly along the engagement element, the end surface of the sleeve is directed axially and cooperates with the cam, and the angle-altering means operates in at least two modes: an adjustment mode where the angle between engagement elements can be altered, and a locked mode where the angle between engagement elements is locked in position, the locked mode occurring upon interaction of the end surface of the sleeve with the cam of the at least one support unit.