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| Number | Title | Issue Date |
| 8127705 | Water entry system A water entry system increases the drag of an underwater vehicle by disrupting the cavity that forms during high-speed transit of the vehicle through the water. A series of inlet ports are positioned in regions of the vehicle where pressure stagnation occurs during ... | 03/06/2012 |
| 8109224 | Submarine with underwater exhaust discharge during snorkeling mode A submarine or surface watercraft is equipped with at least one, preferably supercharged charging diesel engine, which serves to charge the vessel's batteries and which is operated in a controlled and regulated manner during submarine snorkeling mode or during the n... | 02/07/2012 |
| 8082870 | Multiplex-thruster systems for delivering thrusting flow Designs and techniques for fluid thrusters and vehicles that are powered by propelling fluids with fluid thrusters. Multiplex-thruster (MT) systems are disclosed that include a single thruster and a flow multiplexer with multiple channels to deliver thrusting flow i... | 12/27/2011 |
| 8065972 | Underwater vehicle An underwater vehicle comprising an electrical power generation system that converts thermal energy from a body of water into electrical energy is disclosed. The vehicle comprises the electrical power generation system and a thermal mass whose temperature is based o... | 11/29/2011 |
| 8042483 | Apparatus for control of stator wakes The invention as disclosed is an apparatus that controls the wake of stator blades on an underwater vehicle. The apparatus comprises one or more stator blades each with a movable trailing edge that when actuated in a controlled manner produces a periodic flapping mo... | 10/25/2011 |
| 7938077 | Hydrogen generation apparatus for an underwater vehicle A hydrogen generation apparatus for an underwater vehicle is presented, the apparatus including a hydrolysis reaction compartment, a mass of solid lithium hydride disposed in the compartment, inlet and outlet structure for passing sea water through the compartment t... | 05/10/2011 |
| 7841290 | Marine shaftless external propulsor In one general aspect, a shaftless external propulsion system as described herein provides a sleeve configured to be externally mounted over a hull of a marine vehicle. In addition, the shaftless propulsion system provides a rotor and a first stator mounted on the s... | 11/30/2010 |
| 7441509 | Ice fish casting submarine having bait/lure carrying compartment An ice fishing submarine for carrying an end portion of a fishing line radially away from an ice fishing hole comprising: i) a hull enclosing a propulsion system which includes a battery which powers an electric motor which turns a propeller; ii) a power switch to b... | 10/28/2008 |
| 7353768 | Underwater vehicle propulsion and power generation An underwater vehicle includes a shaft with a propeller disposed thereon; a generator/motor having a stator and a rotor, the rotor being operable to rotate with the propeller; at least one energy storage device connected to the generator/motor; and a controller for ... | 04/08/2008 |
| 7315099 | Cooled electric drive unit for a motor vehicle An electric drive unit for a motor vehicle, comprising: (a) a stub axle; (b) an electric motor having a stator that is fixed with respect to the stub axle and having a rotor that is rotatably supported with respect to the stub axle; ... | 01/01/2008 |
| 7300323 | Linear actuator for flapping hydrofoil A linear actuator is provided that converts linear motion to oscillatory motion. The linear actuator includes flats, a hinge, and linear actuators. A hydrofoil is mountable on a spindle attached to the hinge. In operation, a linear push direction by the linear actua... | 11/27/2007 |
| 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 |
| 7131385 | Method for braking a vessel with two marine propulsion devices A method for controlling the movement of a marine vessel comprises steps that rotate two marine propulsion devices about their respective axes in order to increase the hydrodynamic resistance of the marine propulsion devices as they move through the water with the m... | 11/07/2006 |
| 7128624 | Rechargeable open cycle underwater propulsion system In an underwater vehicle, hydrogen and oxygen are fed into a combustion chamber of a combustor of the underwater vehicle to initiate a combustion reaction, which generates high-pressure steam. The high-pressure steam can be cooled with the injection of seawater, and... | 10/31/2006 |
| 7074033 | Partially-open fired heater cycle providing high thermal efficiencies and ultra-low emissions A partially open fired heater regenerative cycle wherein the fired industrial type heater cycle's heat transfer fluid replaces the air predominant nitrogen heat transfer fluid employed in a conventional air/fuel combustion heater. The heater cycle's method and appar... | 07/11/2006 |
| 7007625 | Location and movement of remote operated vehicles A remote operated vehicle system comprises a topside, a fish equipped with a GPS receiver, a transmitter for transmitting GPS position data, and a receiver operable to receive the transmitted position data. Transmission may be from the fish to the topside or from th... | 03/07/2006 |
| 6978617 | Power generation system using a combustion system and a fuel cell A regenerative fuel cell is combined with a combustion engine such as a Pulse Detonation Engine (PDE) to create a closed-loop power generation system. Stored hydrogen and oxygen are used by the regenerative fuel cell, and by the combustion engine, in which the react... | 12/27/2005 |
| 6974356 | Amphibious robot devices and related methods Devices for navigating in a fluid medium having a solid boundary include a vehicle body and a fin attached to the vehicle body. The fin is configured to oscillate relative to the body such that interaction between the fin and the fluid medium produces propulsive for... | 12/13/2005 |
| 6746287 | Underwater propelling apparatus which stably carries out a propelling operation and a steering operation An underwater propelling apparatus includes a body and a plurality of vibrating units. The plurality of vibrating units are placed in parallel to each other on a rear side of the body. Each of the plurality of vibrating units vibrates repeatedly and reciprocally to ... | 06/08/2004 |
| 6736687 | Method for discharging waste gas from submarines without a signature The invention relates to a method and a device for discharging signature free exhaust gas from underwater vehicles, the exhaust gas being a by-product of the production of electric energy in energy converters and being directed by means of pressure into a pipe lengt... | 05/18/2004 |
| 6725797 | Method and apparatus for propelling a surface ship through water A method and apparatus for propelling a surface vehicle through the water comprised of a submerged portion, including both a stern propulsion unit and a bow propulsion unit. Either unit may be a pumpjet, the bow unit may include a counter-rotating nose hub having at... | 04/27/2004 |
| 6688251 | Vehicle of immersion forced by hydrodynamic flow (VIFHF) A submersible vehicle of diverse use that eliminates the compartments of ballast, and at the same time, has a horizontal displacement system and new direction. The vehicle includes a water pump adapted to generate a flow of water; an admission duct to rec... | 02/10/2004 |
| 6662742 | Remote operated vehicles An ROV comprising a topside, a fish and an umbilical cable for connecting the topside and the fish together. The fish is adapted to be powered by an onboard battery inductively coupled to the fish. The cable is of a fine diameter to reduce drag through th... | 12/16/2003 |
| 6658332 | Anti-terrorism shipping control An anti-terrorist ship control system includes satellites that automatically take control of a waterborne vessel when the vessel's position or speed deviate from planned tracks or when the vessel transmits a distress signal or when the vessel stops report... | 12/02/2003 |
| 6581537 | Propulsion of underwater vehicles using differential and vectored thrust An underwater or submersible vehicle including an elongated body having a substantially ellipsoidal forward section, a substantially cylindrical mid-section, and a tapered aft section having an internal vectored thrust propulsion system for propelling and... | 06/24/2003 |
| 6572422 | Tail assembly for an underwater vehicle An assembly for an underwater vehicle that includes a motor, a duct assembly, and an actuator. The duct assembly includes a duct and a propeller mounted within the duct, where the propeller is driven by the motor. The actuator is connected to the duct ass... | 06/03/2003 |
| 6484660 | Underwater nuclear material reconnaissance system An underwater nuclear material reconnaissance system includes an underwater vehicle propelled/steered by a plurality of propulsion pods distributed thereabout. The underwater vehicle includes nuclear material sensors for generating sensor data indicative ... | 11/26/2002 |
| 6378801 | Devices and methods for orienting and steering in three-dimensional space A self-orienting device comprises: a housing; a sensor mounted to the housing that is sensitive to a signal field and configured to produce a signal responsive to the signal field; a translation-inducing unit associated with the housing; rotation-inducing... | 04/30/2002 |
| 6217399 | Propulsion arrangement for axisymmetric fluid-borne vehicles In the propulsion arrangement for an axisymmetric vehicle described in the specification, four propulsion modules are removably mounted at the rear of a vehicle in symmetric disposition about the vehicle axis, each module having an inlet section at its fo... | 04/17/2001 |
| 6203388 | Integrated external electric drive propulsion module arrangement for surface ships In the external electric drive propulsion module arrangement described in the specification, two parallel propulsion units are mounted in a housing affixed beneath the stern of a ship and having a surface contour conforming to the contour of the adjacent ... | 03/20/2001 |
| 6161495 | Power storage for marine seismic vessel A marine vessel having backup power storage in the event of primary power source failure. The invention applies to different marine vessels and is particularly suited to vessels used in marine seismic operations. A rotating mass energy storage provides st... | 12/19/2000 |
| 6138604 | Pelagic free swinging aquatic vehicle A pelagic free swimming aquatic vehicle includes a rigid forebody having a predetermined volume; a watertight chamber in the forebody; and a flexible afterbody having a lesser volume than the forebody and including a maneuvering and propulsion propulsion ... | 10/31/2000 |
| 6095078 | Submarine propulsion control system An underwater vehicle having a negative buoyancy and thrust units by which it can hover is described. Slow speed maneuverability while hovering is achieved by moving the position of a mass fore and aft and/or side to side such as to cause the vehicle to p... | 08/01/2000 |
| 6089178 | Submersible vehicle having swinging wings A submersible vehicle is a type having swinging wings. The vehicle is provided with a vehicle main body, a plurality of swinging wings provided for the main body and arranged in series, rotatable shafts located at front edges of the swinging wings, respec... | 07/18/2000 |
| 5947051 | Underwater self-propelled surface adhering robotically operated vehicle An underwater self-propelled surface-adhering robotically operated vehicle capable of being navigated through a volume of water and of adhering itself to an underwater surface and traversing along the surface. The vehicle has a main body with an interior ... | 09/07/1999 |
| 5704309 | Hybrid boat and underwater watercraft A hybrid boat and underwater craft and method for operating an underwater craft having positive buoyancy, a three-point stabilization system and vertical thruster and a system for enhanced buoyancy at the surface.... | 01/06/1998 |
| 5702273 | Marine propulsion system for underwater vehicles A marine propulsion system for underwater vehicles includes motor inner sor assemblies disposed in hull portions of the vehicle, fixed blades extending outwardly from an after one of the hull portions, a shroud fixed to outer ends of the fixed blades and... | 12/30/1997 |
| 5687670 | Circumferential circulation control system Disclosed is a device used to maneuver a vehicle consisting of a tubular y with suction circumferential slots adjacent its forward end and exhaust circumferential slots adjacent its aft end on both the outer and inner peripheral surfaces. Fluid is convey... | 11/18/1997 |
| 5613456 | Microbubble positioning and control system A system for positioning and sizing microbubbles in a liquid such as water. first source of acoustic energy produces a first acoustic signal in the liquid, and a second source of acoustic energy produces a second acoustic signal in the liquid. The first a... | 03/25/1997 |
| 5574246 | Underwater vehicle with improved jet pump propulsion configuration An underwater vehicle such as a torpedo has a jet pump propulsion system. A high speed pump is located inside a rigid cylindrical housing of the torpedo near an end thereof. A water inlet communicates with the pump as does a water outlet provided at the a... | 11/12/1996 |
