US Patent 7874619 Adjustable lumbar support for a chair back

An adjustable lumbar support for a chair back having a frame with a top end and a bottom end. The frame has a series of flexing zones and a series of control zones. The adjustable lumbar support for a chair back further includes a support having a first end and a second end. The first end of the support is adapted to engage the top end of the frame. The lumbar support also includes an adjusting means adapted to adjust the support in a vertical plane for flexing of the frame and the chair back in a horizontal plane. The adjusting means is also adapted to engage the second end of the support and adapted to engage the bottom end of the frame. The frame is mounted to the chair back.