US Patent 7437789 Lumbar back support device

A lumbar support pillow for supporting the lumbar spine of a person. The support pillow includes a fillable elongate first chamber longitudinally configured to engage and support the person along the longitudinal axis of the person's lumbar spine in a manner substantially conforming to the natural curvature of the spine when filled. The pillow also includes a second chamber that extends downwardly and away from the first chamber on both sides of the first chamber; is independent of the first chamber, and is configured to engage and support the person in a region laterally adjacent to the person's lumbar spine.