Patent ID: 7530322

Claim:
An apparatus for use on water that is foldable into a compact shape for transport, said apparatus comprising: a sheet of corrugated material having a generally rectangular shape, said sheet of corrugated material having a first surface, a second surface, and a plurality of parallel flutes connecting said first and second surfaces, said sheet foldable into a first configuration in which said sheet assumes a hull-shape, said sheet foldable into a second configuration in which said sheet assumes a box-shape, in said first configuration said sheet includes a deck, a transom, and a pair of sidewalls, said deck joined to each of said pair of sidewalls and said transom by a first joint, in said second configuration said sheet includes a top, a bottom, and a pair of sidewalls, said sheet having a plurality of second joints connecting said top, said bottom, and said pair of sidewalls, in said second configuration said pair of sidewalls are folded to be positioned adjacent said deck, each one of said plurality of second joints having a channel defined by said first surface, a portion of said plurality of flutes attached to said first surface, and a pair of edges of said second surface, said one of said plurality of second joints being a hinge with a first position in which said first surface on opposite sides of said second joint are adjacent and with a second position in which said second surface on said opposite sides of said second joint are adjacent; and a cross-member releaseably attachable to each one of said pair of sidewalls adjacent a gunwales of each of said pair of sidewalls when said sheet is in said first configuration, said member bridging said pair of sidewalls.