Patent ID: 8858555

Claim:
An external fixation system comprising: a generally planar ring element extending along a first axis lying in a plane of the generally planar ring element; an adjustable device having a body releasably mounted on the ring element, the body having first and second ends spaced along the first axis of the generally planar ring element, the adjustable device comprising: a first member mounted on the body for movement thereon in a direction generally perpendicular to the plane of the ring element; a second member pivotally mounted on the first member for angular movement relative thereto about a pivot axis extending in a direction nonparallel to the first axis of the ring element, a first drive screw mounted on the first member capable of engaging a drive element on the second member for pivoting the second member relative to the first member about the pivot axis; a third member mounted on the second member for movement along a second axis extending between first and second ends of the second member, a second drive screw mounted on the second member and engaging a threaded bore in the third member, the threaded bore extends parallel to the second axis for moving the third member relative to the second member; and a bone engaging element mounted on the third member, the third member located so that the bone engaging element can move intermediate the first and second ends of the body.