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| Number | Title | Issue Date |
| 7950341 | Ship with a special lower level The ship body of the present invention comprises at least two levels. One is an upper level that comprises a floatable body. The other is a lower level. The lower level is intended to be submerged under water in normal use. The lower level comprises at least two par... | 05/31/2011 |
| 7581508 | Monohull fast ship or semi-planing monohull with a drag reduction method A monohull surface ship has a hull having a profile which produces a high pressure area at a bottom portion of the hull in a stern section of the hull and hydrodynamic lifting of the stern section at a speed above a length Froude number of 0.30. The ship includes an... | 09/01/2009 |
| 7424859 | Shallow water boat A shallow water boat is shown that operates well in both shallow water and deep water. A tunnel is provided along a centerline of a flat bottom, which tunnel starts near amidships increases in depth and terminates at the aft of the shallow water boat. A top of the t... | 09/16/2008 |
| 7338336 | Watercraft hull with adjustable keel A watercraft hull having a pair of laterally spaced propulsion tunnels located on opposite sides of its keel, with said tunnels being open downwardly towards the water, includes a movably mounted keel section located between said propulsion tunnels to prevent water ... | 03/04/2008 |
| 7328668 | Hybrid vee-hull / wing-in-ground effect vessel An improved planing hull which incorporates a vee-bow (1) with outboard chines (2) designed to trap air and water between said chines. As the chines (2) extend aft they become wider and deeper (3) in the water. The vee-bow (1) ensu... | 02/12/2008 |
| 7311059 | Watercraft hull with entrapment tunnel A watercraft hull has at least one bent entrapment tunnel with an aft portion whose tunnel ceiling is at a higher elevation than portions of the tunnel ceiling immediately in front of it to provide a negative angle of attack with the free surface at design planing s... | 12/25/2007 |
| 7299763 | Hull with propulsion tunnel and leading edge interceptor A boat hull has at least one ventilating propulsion tunnel formed therein open to the water forward of the hull's transom and adapted to contain a propeller of the propulsion system. The tunnel has a leading edge forward of the transom and an interceptor plate proje... | 11/27/2007 |
| 7281480 | Frictionally reduced hull A frictionally reduced hull is provided for a marine vessel, the hull having a water line, a bow end and an aft end. The hull has a first opening below the water line and a second opening below the water line. The first opening is closer than the second opening to t... | 10/16/2007 |
| 7246565 | Boat hull dispersion tunnel engagement device and method A boat hull includes a dispersion tunnel extending fore and aft forming a channel within a hull bottom surface for receiving a flow of water. A gate is inserted into and out of the channel for affecting pressure on the hull bottom with movement between open and clos... | 07/24/2007 |
| 7216601 | Apparatus and method for a dual hull boat with control gate The current invention is an apparatus and method for an inner and outer dual hull boat capable of transforming between different levels of planing ability. The design is a gateway in the outer hull which allows water to pass through the void between the inner and ou... | 05/15/2007 |
| 7192322 | Line design and propulsion system for a directionally stable, seagoing boat with rudder propeller drive system A seagoing boat is driven by at least two rudder propellers and has a hull for transporting cargo or passengers. The rudder propellers are preferably embodied as electric rudder propellers. The hull has an approximately rectangular cross section amidships, to which ... | 03/20/2007 |
| 7115007 | Stern unit for marine craft A stern unit of marine craft that comprises a casing, a propeller, a propeller shaft, and at least one rudder actuated by hydraulic pistons is described. The casing is open at the bottom, with its bottom surface having a parabolic shape in cross-section. The casing ... | 10/03/2006 |
| 7093553 | Super high speed multi-hull watercraft A watercraft with at least one onboard propulsion engine includes at least two hulls and a wing-like deck structure spanning the two hulls (a floating wing). Port and starboard skirts combine with the deck structure to form port and starboard planing channels. The d... | 08/22/2006 |
| 7044073 | Methods for reducing the viscous drag on a surface and drag reducing device A submerged surface is created, either as an add-on application or as an integral part of the submerged structure, having an array of closely spaced small bubble-filled holes which cover a large fraction of the wetted surface area. The viscous drag on the bubbles is... | 05/16/2006 |
| 7004094 | Drag reduction system and method A system for reducing skin friction drag includes a user-controlled drag reducing substance and components for introducing the substance at or near the surface of the object for which skin friction drag is desired. In a fluid injection system embodiment, a pressuriz... | 02/28/2006 |
| 7000554 | Frictionally reduced hull A frictionally reduced hull is provided for a marine vessel, the hull having a water line, a bow end and an aft end. The hull has a first opening below the water line and a second opening below the water line. The first opening is closer than the second opening to t... | 02/21/2006 |
| 6957620 | Self-generating air cushion vessel A drag-reducing air chamber is formed under a watercraft when the watercraft is underway. Air enters into the air chamber when the watercraft is moving forward. Supplemental air is introduced into the air chamber by an air scoop mounted to the bow in a first embodim... | 10/25/2005 |
| 6901873 | Low-drag hydrodynamic surfaces The invention relates to the use of gas cavities to reduce frictional drag on underwater surfaces such as hydrofoils, struts, fins, rudders, keels, propeller blades, ship hulls, underwater bodies, and wetted surfaces in general. Each gas-filled cavity is formed behi... | 06/07/2005 |
| 6899045 | Air lubricated lifting body ship Presented is a lifting body ship that has a blower pressurized air layer disposed in the underside of its lifting body such that the air layer reduces wetted area friction and hence the propulsive power required is greatly reduced. Further, a water propulsor is supp... | 05/31/2005 |
| 6860770 | Method and device for low-noise underwater propulsion and for reducing hull drag A method and apparatus is disclosed for producing propulsion underwater with minimal acoustical emission. In basic concept, the method comprises the expulsion and sucking of liquid into and out of a liquid port of a watercraft in a manner generating compression and ... | 03/01/2005 |
| 6679192 | Integrated entry air cushion marine vessel and marine platform A monohull marine platform is provided which includes a plurality of bows each having a flat lower keel. A transverse stern seal is connected to the bows using an inclined lift surface and a pair of outboard seals forming an air chamber. Pressurized air i... | 01/20/2004 |
| 6648270 | Vehicle A vehicle is disclosed having a hull with a longitudinal, vertical and lateral axis, the hull further having front end and rear ends and first and second sides. A turbofan engine mounted in said hull, said engine having an exhaust duct. First and second f... | 11/18/2003 |
| 6631689 | Recycled cushion, finned, and bustled air cushion enhanced ship Presented is a highly efficient and stable ship concept that is at least partially supported by an artificially produced gas cushion(s). Addition of a stern bustle aft of the gas cushion(s) improves hull efficiency. Special location of water inlets for wa... | 10/14/2003 |
| 6604484 | Ship supported by submerged structure A high efficiency extremely stable marine vehicle that is connected to and supported by submerged supporting structure(s) is presented. The submerged structure(s) are normally airfoil shaped to insure maximum efficiency and are, in the preferred embodimen... | 08/12/2003 |
| 6604478 | Hull configuration utilizing multiple effects for enhanced speed, range and efficiency A hull configuration for a vessel that utilizes multiple effects to reduce friction between the vessel and the water's surface is provided by the present invention. In various embodiments, a surface effect is employed such that a supporting cushion of air... | 08/12/2003 |
| 6067923 | Turbulent stabilizing venturi system A hull configuration for the planar surface region in the tunnel area between hulls(pontoons) in a fishing type catamaran. In the tunnel bottom surface is a raised frontwardly located center section adjacent the bow forms a venturi where low pressure is f... | 05/30/2000 |
| 5850793 | Hydrochannel tri-hull A tri-hull using air and water collectively channeled and controlled through its design to enhance speed and stability of the tri-hull as it moves forward through the water. Structural wings connecting the two outer hulls to the middle hull comprise opera... | 12/22/1998 |
| 5787829 | Apparatus and method for suppressing drag for small planing watercraft A discharge port 4 for discharging air into water is provided on the bottom of a craft behind the rear end of a strip 3 which is installed on the bottom of a small planing watercraft to protrude therefrom and extend in the longitudinal direction of the cr... | 08/04/1998 |
| 5570650 | Surface effect vessel hull A surface effect hull particularly suitable for use with a catamaran vessel. The twin hulls each comprise a V-shaped portion and a recess portion that receives pressurized gas therein. The V-shaped bow portion create dynamic lift and the pressurized air p... | 11/05/1996 |
| 5524568 | Air bubble lubricated boat hull Frictional resistance to motion of a boat is reduced by generating an unconfined layer of intermixed air bubbles and water adjacent at least a portion of the hull of the boat including at upcurving side surfaces of the hull. In the preferred form of the i... | 06/11/1996 |
| 5456201 | Air bubble lubricated boat hull Frictional resistance to motion of a boat is reduced by generating an unconfined layer of intermixed air bubbles and water adjacent at least a portion of the hull of the boat including at upcurving side surfaces of the hull. In the preferred form of the i... | 10/10/1995 |
| 5415120 | Multiple hull air ride craft An improved performance marine surface vessel that includes pressurized supporting gas cushions in multiple hulls, normally catamaran-like sidehulls, where such pressurized supporting gas cushions support a majority of boat weight in operation. The prefer... | 05/16/1995 |
| 5176095 | Multiple hull air ride boat An improved performance marine surface vessel that includes pressurized supporting gas cushions in multiple hulls, normally catamaran-like sidehulls, where such pressurized supporting gas cushions support a majority of boat weight in operation. The prefer... | 01/05/1993 |
| 5158033 | Air cushion vehicles An elongated vehicle body has a forward bow portion, a stern, and a lower portion with the floor and sides runners defining a longitudinal rearwardly opening air channel in the underside thereof. The bow portion has a duct with a driven impeller therein c... | 10/27/1992 |
| 5054412 | Hydrodynamic skin-friction reduction A process for reducing skin friction, inhibiting the effects of liquid turbulence, and decreasing heat transfer in a system involving flow of a liquid along a surface of a body includes applying a substantially integral sheet of a gas, e.g., air, immediat... | 10/08/1991 |
| 5038696 | Ship's hull having monohull forebody and catamaran afterbody A ship's hull is constructed of a monohull forebody shaped to be lifted upwardly as the ship speeds through the water and a catamaran afterbody which extends to rear of the monohull forebody. A deck disposed over a tunnel defined between a pair of catamar... | 08/13/1991 |
| 5025745 | Boat hull A boat hull for an air thrust propeller driven boat is provided that includes a double hull construction along at least a portion of the length of the hull. The lower member of the double bottom portion of the hull is provided with a plurality of aperture... | 06/25/1991 |
| 4993349 | Propulsion for boats consisting of jets of air drawn into a pair of longitudinal channels under the hull Propulsion for boats (10) by jets of compressed air inside a pair of parallel longitudinal channels (11) open underneath, placed below the hull, substantially horizontal, one on each side of a third wider axial channel (13) suitable for formation, as a co... | 02/19/1991 |
| 4989534 | Boat hull having stepped underside A boat hull having a bow, an underside and also including at least one transverse step extending at least partly across the hull underside. The boat hull is characterized in the provision of a venting tube which extends from the transverse step substantia... | 02/05/1991 |
| 4977845 | Boat propulsion and handling system An improved boat construction is disclosed in which a boat, having the typical elongated hull, bow and stern, has a bottom configured as a hydroplane including a transverse step spaced from the bow and stern. A well is provided in the boat bottom and exte... | 12/18/1990 |
