Patent ID: 9567037
Date: 2017-02-14
CPC Classifications: B63B,F16B

Claim:
1. A deep-drawn, marine hull comprising: an outer skin of fiber-reinforced thermoplastic material and having a waterproof outer surface; a first sheet of thermoplastic adhesive; an inner skin of fiber-reinforced thermoplastic material and having a compartment-defining outer surface; and a second sheet of thermoplastic adhesive; a shock absorbing, cellular core of a cellulose-based material and positioned between the skins wherein the skins are bonded to the core by the first and second sheets and by press molding, wherein the cellular core has a 2-D array of cells, each of the cells having an axis substantially perpendicular to the outer surfaces, wherein thickness of side walls of the hull is substantially uniform to maximize stiffness of the hull, the cells absorbing energy of an impact at the outer surface of the outer skin by deformably crushing, wherein air trapped within cells which are not completely crushed or punctured by the impact provide the hull with buoyancy to allow the hull to float at the surface of a body of water.