Patent ID: 7753915

Claim:
An arrangement for adjusting a length or distance between bone parts when coupled to the bone parts, comprising: a telescoping device comprising: a first part adapted to be coupled to a first bone part and including a first cavity, a second part adapted to be coupled to a second bone part and including a second cavity, said first and second parts of said telescoping device being axially movable relative to one another, said first cavity facing said second part, said second part being situated at least partially in said first cavity and partly slidable therein, a rod arranged in said first and second cavities defined by said first and second parts of said telescoping device, respectively, and having a first end portion movable relative to said first part of said telescoping device and a second end portion movable relative to said second part of said telescoping device, and at least one magnet arranged in connection with said rod, said rod being rotationally coupled to an interior of both of said first and second parts of said telescoping device such that rotation of said rod is translated into axial movement of said first part and second part of said telescoping device; and a magnetic field generating mechanism that causes rotation of said at least one magnet to thereby cause rotation of said rod and axial movement of at least one of said first and second parts of said telescoping device, said magnetic field generating mechanism comprising a frame and a solenoid arrangement arranged outside of said telescoping device and arranged to generate a dynamic magnetic field around an operative region to cause rotation of said at least one magnet when situated in said operative region, said solenoid arrangement comprising a plurality of pairs of solenoids housed in said frame, said solenoids being arranged in a common plane and each of said pairs of solenoids having a common axis, said frame being arranged to position a portion of the body having said telescoping device such that said at least one magnet is aligned with and between said pairs of solenoids.