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"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 8092265 | Jet propulsion device A jet propulsion device and method for controlling movement of the jet propulsion device, where liquid inlets are positioned at a distance from the surface of the device. Preferably, the inlets are positioned in the stabilizing fins of the device. When the device re... | 01/10/2012 |
| 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 |
| 7226325 | Device for stabilizing re-entrant cavity flows past high-speed underwater vehicles A stabilizing device for a supercavitating vehicle that isolates re-entrant jet flows of liquid from its cavity. The device has a receiving means positioned on the supercavitating vehicle where the re-entrant jet flow impinges on the supercavitating vehicle. An exit... | 06/05/2007 |
| 7201621 | Portable bow thruster for small boats A portable bow thruster for use on the bow of a boat in a body of water having a water line. The bow thruster includes a blower assembly for producing an air flow to provide thrust, an exhaust air duct for expelling the air flow from the blower assembly, pivoting me... | 04/10/2007 |
| 7096810 | Bow mounted vessel propulsion system A bow mounted vessel propulsion system is designed to exploit the characteristics of a self-producing vessel lubricating boundary layer of air or air bubbles formed during water surface interaction by the vessel's hull during vessel movement. This boundary layer of ... | 08/29/2006 |
| 7089875 | Gliding board for sports activities on water, snow, sand lawn and the like The invention relates to a gliding board for sports activities on water, snow, sand, lawn and the like, comprising a body resembling a board, which is equipped with a drive motor, wherein a self-supporting tank for the drive motor covering a large surface of the str... | 08/15/2006 |
| 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 |
| 6878021 | Seahorse A water craft that is made in three units which are connected together. The dimensions of the units can be varied to carry different size users. A motor that forces air through a tube is mounted in one of the units and air passageways lead from the motor to another ... | 04/12/2005 |
| 6250978 | Steam phase change waterjet drive A waterjet drive engine for the propulsion of large ships includes an elongated water conduit having a rearwardly directed exhaust portal, a forward extremity having a water intake portal, and a middle portion of larger diameter than the diameter of the e... | 06/26/2001 |
| 5692371 | Underwater two phase ramjet engine An underwater two-phase ramjet engine propulsion unit, including an inlet for receiving a flow of water, compressed gas injector for injecting compressed gas into the flow of water, a mixing chamber for mixing the compressed gas with the flow of water to ... | 12/02/1997 |
| 5687671 | Underwater propulsion device Disclosed is a water jet propulsion device for divers and diver equipment. forward pressurized air chamber and a rearward water containing chamber are positioned inside a cylindrical housing and are separated by a flexible membrane which is adjacent to a ... | 11/18/1997 |
| 5598700 | Underwater two phase ramjet engine An underwater two-phase ramjet engine propulsion unit, includes an inlet for receiving a flow of water, compressed gas injector for injecting compressed gas into the flow of water, a mixing chamber for mixing the compressed gas with the flow of water to p... | 02/04/1997 |
| 5558509 | Sliding-blade water jet propulsion apparatus for watercraft A sliding-blade water jet propulsion apparatus has an oval-shaped chamber and a water channel extending generally tangential to the chamber with a cylindrical rotor rotatably mounted eccentrically in the chamber. The rotor has at least two rectangular bla... | 09/24/1996 |
| 5421153 | Hydrodynamic propulsion device A hydrodynamic propulsion device possessing an expansion chamber located downstream of a cross-sectional widening for the inflow of a medium which is to be expelled through a discharge nozzle. The propulsion device is constructed as a static propulsion me... | 06/06/1995 |
| 5372527 | Turbo kick board The present invention relates to a turbo kick board. The turbo kick board includes, a base, propellers attached to the base to make the base stop and go, and a rudder attached to the base to make the base turn right and left.... | 12/13/1994 |
| 5344345 | Water vessel propulsion apparatus A water jet propulsion apparatus creates a high speed water jet rearwardly through a duct in a hull by injecting air and water into the duct from at least one injection port, thereby to impart a thrust to the hull. The need of forming protrusions such as ... | 09/06/1994 |
| 5232385 | Gas turbine powered ship A twin-hulled ship is powered by a gas turbine engine in each hull, the engine being located near the waterline in vertical alignment with a position outboard of the superstructure's internal sidewall, but preferably inboard of the superstructure's extern... | 08/03/1993 |
| 5193475 | Thrust expansion engine Break-up activity of water by injection of hot propellant gas into channels f a thrust expansion engine is suppressed to prevent rapid cooling of the gas, utilizing one or more methods including injection of a secondary inflow of the propellant gas and/or ... | 03/16/1993 |
| 5045004 | Turbo-hydroduct propulsion system The invention defines a propulsion system for an underwater vehicle. More particularly, the invention describes a turbo-hydroduct propulsion system which operates on stored, high energy fuel. The fuel is combusted and powers a turbopump which pressurizes ... | 09/03/1991 |
| 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 |
| 4979917 | Marine propulsion device with gaseous boundry layer for a thrust jet flow stream exhibiting stealth and ice lubrication properties An engine or motor is attached in a driving relationship to a water moving device, such as a pump, and a thrust outputing portion, such as a nozzle. Heat generated by and rejected by the engine or motor is passed into the pump base for dissipation into th... | 12/25/1990 |
| 4767364 | Advanced steering and propulsion system for ships A steering and propulsion system for a ship, including two side by side, fore and aft pipes underneath a ship's hull, and compressed air or steam delivered through tubes around an exterior of the hull to the two pipes, and controls to eject forwardly or r... | 08/30/1988 |
| 4424042 | Propulsion system for an underwater vehicle A propulsion system for an underwater vehicle includes a solid propellant gas generator producing gas which drives a gas turbine. The turbine drives one, or alternately two, centrifugal pumps which induct sea water from intake ports and supply it under pr... | 01/03/1984 |
| 3978814 | Air nozzle controlled marine propulsion system A marine propulsion system includes a hull-contained, open-ended duct extending from bow to stern along the bottom of a vessel, the top of the duct being disposed above the water line and all duct walls extending parallel to the axis of motion of the vess... | 09/07/1976 |
