Patent ID: 7803467

Claim:
A panel assembly comprising: a sheet of material configured to move between a nonexpanded position, wherein the sheet of material forms a substantially flat shape, and an expanded position, wherein the sheet of material forms a substantially stepped shape; a first side segment formed in the sheet of material and having an outer leg and an inner leg configured to allow the first side segment to bow when the sheet of material moves from the nonexpanded position to the expanded position; a second side segment formed in the sheet of material and having an outer leg and an inner leg configured to allow the second side segment to bow when the sheet of material moves from the nonexpanded position to the expanded position; an inner segment formed in the sheet of material and having a first leg and a second leg configured to allow the inner segment to bow when the sheet of material moves from the nonexpanded position to the expanded position; and a first end plate configured to connect to the sheet of material, and maintain the sheet of material in the expanded position.