US Patent 7644981 Collapsible and portable chair

A portable two-frame collapsible chair comprised of an inner and outer frame with the frames hingably joined for rotating between a first position for carrying and a second position for sitting. The chair includes a flexible seat member connected to both frames. The chair further includes a flexible backrest hingably connected to the outer frame with optional armrests hingably attached. The frames can be folded into substantially the same plane when in the first position for carrying. The position for carrying includes a variety of configurations including a backpack configuration, wherein the user uses shoulder straps to carry the chair, and a roller bag configuration wherein the chair has wheels and a pull handle.