Patent ID: 8197490

Claim:
A non-invasive adjustable distraction system comprising: an implantable distraction rod having a first end and a second end, the first end being configured for subcutaneous affixation to a subject's bone at a first location, the implantable distraction rod having a second end containing a recess having a threaded portion disposed therein; and an adjustable portion configured for subcutaneous placement relative to the subject's bone at a second location different from the first location, the adjustable portion comprising a housing containing a permanent magnet configured for rotation about a longitudinal axis of rotation, the permanent magnet contained within a magnetic assembly affixed at one end thereof to a lead screw via a locking pin passing transversely through both an aperture disposed in the lead screw and at least part of the magnetic assembly, the lead screw operatively coupled to the threaded portion, wherein the lead screw is substantially coaxial with the longitudinal axis of rotation of the permanent magnet and configured to permit at least some angular displacement of the lead screw relative to the longitudinal axis of rotation.