US Patent 7469506 Retractable roof assembly

A retractable cover for a surface includes a first section configured to be movably coupled to the surface and covering at least a first portion of the surface. The first section is movable relative to the surface between an open orientation in which said first portion of the surface is uncovered and a closed orientation in which the first portion of the surface is covered. The retractable cover further includes a second section configured to be movably coupled to the surface. The second section is movable between a lowered orientation relatively closer to a second portion of the surface and a raised orientation relatively more remote from the second portion of the surface.