Patent ID: 6698833
Filing Date: 2004-03-02
Classification: A47C

Abstract:
A seating unit comprising:a base including a control assembly; a seat assembly pivoted to the control assembly for movement about a seat tilt axis; a back assembly pivoted to the control assembly for movement about a back tilt axis, the back assembly including a back support structure and a flexible sheet including an upper portion attached to and supported by the back support structure, the flexible sheet also including a lower portion coupled to the back support structure for holding the lower portion rearwardly; and a vertically-adjustable lumbar mechanism adjustably supported on the back support structure and operably engaging the flexible sheet for biasing an intermediate portion of the flexible sheet forwardly to both form the intermediate portion into a forwardly convex shape for postural lumbar support and also to tension the flexible sheet between the upper, intermediate, and lower portions.