US 6,805,068 B1Granted

Hydrofoil system for lifting a boat partially out of water an amount sufficient to reduce drag

OwnerRaimer Tossavaineninventor

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Abstract

A hydrofoil system for lifting a boat out of water an amount sufficient to reduce drag while still allowing the boat to be powered by a conventional inboard-outboard drive. The hydrofoil system includes a front hydrofoil unit, a center hydrofoil unit, and a pair of rear hydrofoil units. The front hydrofoil unit includes a hydrofoil portion that dependingly mounts to a mounting portion thereof that depends from the bottom of the hull at the bow thereof. The center hydrofoil unit includes a hydrofoil that dependingly extends equidistantly outwardly from a pair of stanchions thereof that depend from the bottom of the hull at the substantial center thereof. Each rear hydrofoil unit includes a hydrofoil that dependingly extends equidistantly outwardly from a pair of stanchions thereof that depend from port and starboard trim tab units of the hull, respectively.

A hydrofoil system for lifting a boat out of water an amount sufficient to reduce drag while still allowing the boat to be powered by a conventional inboard-outboard drive, wherein the boat has a hull with a bottom, a bow, a stern with port and starboard trim tabs, and a substantial center which is intermediate the bow of the hull and the stern of the hull, said system comprising:

a) a front hydrofoil units;
b) a center hydrofoil unit;
and
c) a pair of rear hydrofoil units;
wherein said front hydrofoil unit depends from the bottom of the hull at the bow thereof;
wherein said pair of rear hydrofoil units depend from the port and starboard trim tab units of the hull, respectively;
and
wherein said center hydrofoil unit depend from the bottom of the hull at the substantial center thereof, wherein said front hydrofoil unit comprises a mounting portion;
wherein said front hydrofoil unit comprises a hydrofoil portion;
wherein said mounting portion of said front hydrofoil unit is for mounting to the bottom of the hull at the bow thereof;
wherein said mounting portion of said front hydrofoil unit depends from the bottom of the hull at the bow thereof;
wherein said hydrofoil portion of said front hydrofoil unit mounts to said mounting portion of said front hydrofoil unit;
and
wherein said hydrofoil portion of said front hydrofoil unit depends from said mounting portion of said front hydrofoil unit, wherein said mounting portion of said front hydrofoil unit comprises a pair of upper plates;
wherein said pair of upper plates of said mounting portion of said front hydrofoil unit are disposed in a V-shape along a common edge thereof;
wherein said pair of upper plates of said mounting portion of said front hydrofoil unit are for mounting to the bottom of the hull at the bow thereof;
and
wherein said pair of upper plates of said mounting portion of said front hydrofoil unit depend from the bottom of the hull at the bow thereof.

15 more elements

Facts

Application

10/634,981Filed 5 Aug 2003

Granted

19 Oct 2004

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

B63B 1/242
Of hydrofoil type: mounting, suspension of the foils
B63B 1/18
Deriving additional lift from hydrodynamic forces: of hydroplane type
B63B 39/06
Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude: to decrease vessel movements by…
B63B 39/061
To decrease vessel movements by using foils acting on ambient water: by using trimflaps, i.e. flaps mounted on the rear of a boat, e.g. speed boat

Abstract

Claims20