Patent ID: 7422287
Filing Date: 2008-09-09
Classification: A47C

Abstract:
1. A seating unit comprising: a base; a seat supported on the base; and a back construction operably supported on the base for movement between an upright position and a recline position; the back construction defining a thoracic region, a pelvic region, and a lumbar region between the thoracic and pelvic regions with the lumbar region being located at least partially forward of the thoracic and pelvic regions; the back construction including an upper rigid support structure with a front surface defining part of the thoracic region, a lower rigid support structure that is pivoted to one of the base and seat, and first and second rigid links each pivoted at their upper ends to the upper rigid support structure at first and second upper pivots and each pivoted at their lower ends to the lower rigid support structure at first and second lower pivots; the first and second upper pivots defining an upper first distance therebetween and the first and second lower pivots defining a lower second distance therebetween that is greater than the first distance; the upper and lower rigid support structures and the first and second rigid links being interconnected so that, when a seated user applies rearward pressure to the lumbar region, the back construction changes shape to define a more planar shape.