Ships – Building – Antifriction surfaces
Reexamination Certificate
1999-12-21
2001-04-24
Morano, S. Joseph (Department: 3617)
Ships
Building
Antifriction surfaces
C440S045000
Reexamination Certificate
active
06220193
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to boats and in particular the reduction of resistance to forward motion of high speed water borne vessels.
2. Description of the Related Art
In the past numerous attempts have been made to improve the efficiency of water borne vessels by reducing the resistance to forward motion but very few have been really successful. The notable exceptions being hovercraft and hydrofoils but even these are very specialised and have not fulfilled their original conceptual potential.
SUMMARY OF THE INVENTION
By taking advantage of modern technology it is the objective of the present invention to improve the efficiency of large ocean going vessels and high speed river transport.
The major objective of the present invention is to provide a boat powered by the thrust of a pure jet engine or engines of the type used in high speed aircraft.
According to the present invention a surface effect boat which, in operation, rides on a cushion of contained pressurized gases, said boat having a water line, a bow and stern and comprising a hull and a deck extending horizontally and longitudinally above the hull, said hull including at least three longitudinally extending keels extending the full length of the boat and defining spaces between the keels, a bow plate closing one end of the spaces and a stern plate closing the opposite end of the spaces so as to define at least two downwardly opening cavities, and a single power source comprising at least two gas turbine jet propulsion engines, each of said engines being mounted on the boat, at the bow thereof, within a corresponding cavity between the keels, and being fixedly attached to an underside portion of the deck substantially above the water line of the boat, said engines producing high volume exhaust gases which pressurize the respective cavities with a pressure such that, as the boat is caused to gather speed in response to thrust forces produced by said engines, said pressure increases sufficiently to lift the boat in the water and to thereby substantially reduce resistance to forward motion, a gas pressure discharge tube being disposed in each of said cavities and being fixedly attached to and extending through said stern plate, a control valve being associated with each of said tubes for regulating said pressure, and said keels including inner side plates terminating and downwardly depending knife edge seals.
The bow and stern plates are set at an acute forward leaning angle, the bow plate to reduce air resistance and the stern plate to deflect jet exhaust gases downwards and outwards under the stern plate. Both the bow and stern plates have fixedly attached to their bottom faces flexible trailing seals.
REFERENCES:
patent: 3405675 (1968-10-01), Cockerell et al.
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patent: 3742888 (1973-07-01), Crowley
patent: 4227475 (1980-10-01), Mattox
patent: 4228752 (1980-10-01), Sladek et al.
patent: 4393802 (1983-07-01), Rizzo
patent: 4836121 (1989-06-01), Kordon
patent: 5570650 (1996-11-01), Harley
patent: 5746146 (1998-05-01), Bixel, Jr.
patent: 1190621 (1970-05-01), None
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patent: 2 285 415 (1995-07-01), None
patent: 2 299 974 (1996-10-01), None
patent: WO 98/175242 (1998-04-01), None
Larson & Taylor PLC
Morano S. Joseph
Wright Andrew
LandOfFree
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