Patent ID: 7648204

Claim:
A recliner adjuster comprising: a guide bracket adapted to be fixed to one of a seat cushion and a seat back that can pivot with respect to the seat cushion, the guide bracket having a radially outer surface; an internal gear adapted to be fixed to the other of the seat cushion and the seat back, the internal gear having a ring-shaped peripheral portion and a recess formed inside the ring-shaped peripheral portion, the ring-shaped peripheral portion having a radially outer surface constituting a radially outer surface of the internal gear, and the ring-shaped peripheral portion having a radially inner surface on which radially inwardly projecting teeth are formed; a cam interposed between the guide bracket and the internal gear; a pair of lock gears radially slidable in association with an operation of the cam, the pair of lock gears having radially outwardly projecting teeth for engagement with the radially inwardly projecting teeth of the internal gear; and a mounting ring for assembling the guide bracket and the internal gear together with the cam and the pair of lock gears interposed therebetween, the mounting ring having a flat annular portion and a cylindrical side portion, the cylindrical side portion having an inner surface of uniform diameter and being joined to one of the guide bracket and the internal gear; wherein the radially outer surface of the other of the guide bracket and the internal gear is held in sliding contact with said inner surface of uniform diameter to thereby radially position the other of the guide bracket and the internal gear.