Patent ID: 8567864

Claim:
A chair system comprising: a base comprising a seat for a user and one or more support legs; a back reclinable from an upright position to a reclined position; and a flexible back support member rigidly coupled to the back and to the base, the flexible back support member comprising a flex zone, the flex zone comprising: a beam section, the beam section comprising: a top beam section extending continuously along the flex zone, two or more bottom beam sections integrally formed with the top beam section, wherein each of the two or more bottom beam sections has an external surface and wherein the external surfaces of the two or more bottom beam sections are separated from each other longitudinally by one or more gaps; an insert section coupled to the beam section, the insert section comprising: one or more bottom inserts each positioned within one of the one or more gaps, wherein one or more notches are formed between the one or more bottom inserts and a longitudinally adjacent bottom beam section of the two or more bottom beam sections, wherein the one or more notches are configured to narrow as the back reclines from the upright position to the reclined position, and wherein the one or more notches are open in the upright position and closed in the reclined position.