Patent ID: 8568457

Claim:
A growing rod, comprising: a base rod having an attachment end; an extendable rod being translatable relative to the base rod along a longitudinal axis; a housing enclosing at least a portion of the extendable rod therein; a magnet rotatably mounted within the housing and enclosed by a top magnet cover and a bottom magnet cover, the magnet including a first pole and a second pole; and a gear reduction mechanism associated with the magnet and the extendable rod, the gear reduction mechanism reducing an output rotation to the extendable rod in comparison to an input rotation from the magnet, the gear reduction mechanism comprising: a gear wheel located longitudinally adjacent to a driver wheel, the gear wheel eccentric with the driver wheel and having external gear teeth; a gear housing having internal gear teeth; the driver wheel having driver pins fixed thereto that extend from the driver wheel and that are fitted within the gear wheel, the driver wheel including a threaded shaft, and a carrier that mates with the threaded shaft and mates with the extendable rod by torque pins.