Patent ID: 6874852

Claim:
A chair back comprising: a peripheral frame comprising opposing sides, a top, and a bottom which bound an opening, the peripheral frame having a front face which faces the back of a user during use; a resiliently flexible fabric material directly connected to the opposing sides of the peripheral frame, the resiliently flexible fabric material being drawn taut so that the resiliently flexible fabric material extends directly between the opposing sides and across the opening while passing over at least a portion of the front face of the peripheral frame; a lumbar support portion disposed in the opening, the lumbar support portion comprising a lumbar support panel which is biased forwardly to support a lumbar region of a user through the resiliently flexible fabric material when the user applies rearward force against the resiliently flexible fabric material; two hinge devices hingedly supported by the peripheral frame, the lumbar support portion being in connection with the two hinge devices to mount the lumbar support portion to the peripheral frame; and a biasing device associated with each hinge device to bias the hinge devices forwardly relative to the peripheral frame.