US Patent 7147277 Foldable chair

A chair. The chair folds by a plurality of hinges between an expanded position and a collapsed position to seat a person substantially horizontal while the chair is positioned on an angled surface. The chair comprises a back assembly, a seat assembly, a leg assembly, a seat, an arm assembly, and a foot assembly. The chair further comprises at least one anchor that is configured to penetrate the angled surface in order to stabilize the chair on the angled surface.