Patent ID: 9327618
Filing Date: 2016-05-03
CPC Classification: B60N,F16H

Claim Text:
1. A disc recliner operatively coupling a seat back to a seat cushion to allow selective pivotal movement of the seat back relative to the seat cushion about a pivot axis extending in an axial direction, said disc recliner comprising: a first plate adapted to be fixedly secured to the seat cushion, said first plate including a first plurality of teeth disposed therearound; a second plate adapted to be fixedly secured to the seat back and rotatably coupled to said first plate, said second plate including a second plurality of teeth disposed therearound, wherein a tooth count of said first plurality of teeth does not equal a tooth count of said second plurality of teeth; a flex spline including a flexible wall defining an inner surface and having a third plurality of teeth disposed radially therearound, wherein a tooth count of said third plurality of teeth equals said tooth count of said first plurality of teeth; a wave generator having a first side facing said first plate and a second side facing said second plate and an outer profile defining a circumferential outer edge for causing a portion of said third plurality of teeth to meshingly engage with said first plurality of teeth and said second plurality of teeth, said wave generator including a plurality of spaced apart recesses formed in said outer profile extending axially between said first and second sides; and a roller rotatably supported in each of said recesses along said outer profile of said wave generator, said rollers rotating about an axis generally parallel to the pivot axis and at least one of said rollers directly contacting said inner surface of said flex spline during rotation of said wave generator, wherein said second plate rotates relative to said first plate in response to rotation of said wave generator, thereby causing pivotal movement of the seat back relative to the seat cushion.