Patent ID: 7418915
Filing Date: 2008-09-02
Classification: B63B,Y02T

Abstract:
1. A watercraft comprising a center hull and a pair of outer side hulls respectively located on opposite sides of the center hull and including outer surfaces forming portions of the outer sides of the watercraft, said center hull having a v-form including varying deadrise from the bow to at least a predetermined point forward of the stem, and said side hulls each having inner surface portions facing the center hull having greater reverse deadrise than the deadrise of the opposing surface of the center hull; said outer surfaces of the side hulls being substantially vertical to the water surface when the hull is at rest and extend to a lower keel; said center hull also having vertical surface portions facing the reverse deadrise surface portions of said outer hulls; and said center hull including a deadrise surface portion on each of its sides extending from said vertical surface portions and intersecting with the reverse deadrise surface portion of its adjacent outer hull, whereby said vertical surface portions, reverse deadrise surfaces and deadrise surface portions define an air entrapment tunnel on each side of the center hull; said lower edges of said outer hulls extending to a greater depth below the waterline than said vertical surface portions of the center hull.