Patent ID: 8556762

Claim:
A power seat height adjuster mechanism for a seat of a vehicle comprising: a motor having an output shaft; a speed reduction mechanism comprising a housing and a planetary gear drive disposed in said housing and cooperating with said output shaft of said motor to reduce an output speed of said motor; a nut drive mechanism cooperating with said speed reduction mechanism and having a translatable output member to rotate an adjustment component of the seat to adjust a height of the seat; and a locking mechanism disposed in said housing and cooperating with said planetary gear drive to allow the height of the seat to be adjusted and to prevent the height of the seat from moving once the height has been adjusted; wherein said planetary gear drive includes a driving planetary gear and a driven planetary gear cooperating with said driving planetary gear; and wherein said locking mechanism includes a member acting on either one of said driving planetary gear and said driven planetary gear to prevent reverse rotation thereof once the height of the seat has been adjusted due to said member cooperating with said housing and being prevented from rotational movement.