Patent ID: 7971937

Claim:
A seat adjuster assembly for adjusting a vertically movable upper vehicle seat part relative to a non-vertically movable lower vehicle seat part, the seat adjuster assembly comprising: an electric motor comprising an output shaft with a worm gear positioned in a gearbox; a spindle shaft providing first threads; a spur gear fixed to the spindle shaft, the spur gear meshing with the worm gear; and a linkage system connected to the upper vehicle seat part and the lower vehicle seat part, the linkage system comprising a non-rotatable member providing second threads coacting with the first threads of the spindle shaft such that the linkage system positions vertically the upper vehicle seat part relative to the lower vehicle seat part in response to the position of the spindle shaft relative to the non-rotatable member of the linkage system, wherein at least one washer is provided on the spindle shaft and the spur gear is an over-molded gear embedding the at least one washer therein; and wherein the non-rotatable member of the linkage system is a tube with a nut fixed thereto, the spindle shaft extending through the nut and into the tube, inner threads of the nut forming said second threads.