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US 4,021,874 AGranted
Boat hull
AssigneeCoast Catamaran Corporation
InventorsHobart L. Alter, Peter L. V. Hutchinson
Life of this patent
Estimating the term…
Abstract
A boat hull fabricated from synthetic plastic sheets. The main body and the deck of the hull are separately vacuum-formed. Plastic foam is then adhered onto the interior surfaces of the sheets. The main body and hull thereafter joined along the gunwale.
Claims6
A closed boat hull, comprising:
- a main body shell consisting of a vacuum-formed synthetic plastic sheet and having a heat-activated adhesive on its interior surfaces except along the gunwale portion of said shell;
- a layer of fused synthetic plastic foam secured to the interior surfaces of said main body shell by said heat-activated adhesive except along the gunwale portion of said shell;
- a plurality of longitudinal and transverse upstanding main body ribs integral with said foam layer;
- a deck shell complementary to said main body shell consisting of a vacuum-formed synthetic plastic sheet and having a heat-activated adhesive on its interior surfaces except along the gunwale portion of said shell;
- a layer of fused synthetic plastic foam secured to the interior surfaces of said deck shell by said adhesive except along the gunwale portion of said shell, with the underside of said foam layer being adhered to the upper ends of said main body ribs, the foam affording sufficient buoyancy to render the boat hull unsinkable and also providing rigidity for said boat hull without utilizing other than said main body and deck shells;
- and
- with the gunwale portions of said shells telescopically interfitting and being interconnected at longitudinally spaced points by fastening means extending through said gunwale portions.
4 more elements
Dependencies are inferred from the claim text.