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| Number | Title | Issue Date |
| 7913485 | Dual mode propulsion system A system or method of propelling a vehicle with a multimodal propulsion system is provided. This multimodal propulsion system includes a primary inlet, a high-pressure gas generator, a gas generator exhaust system, a secondary fluid inlet, and a propulsion exhaust s... | 03/29/2011 |
| 7891166 | Water rocket engine with a two-phase nozzle The water rocket engine with a two-phase nozzle includes a water rocket propulsion system having a reservoir, and a nozzle assembly disposed along a central longitudinal axis therein, the nozzle assembly comprising an inverted cup shaped fluid capture vessel having ... | 02/22/2011 |
| 7354322 | Watercraft and waterjet propulsion system The present invention relates to a watercraft with an improved waterjet propulsion system. The present invention further relates to a waterjet propulsion system with an improved steering nozzle design. The watercraft preferably is either what is known as a jet ski, ... | 04/08/2008 |
| 7318759 | Preload system for bearings in a waterjet propulsion apparatus A preload system for bearings in a waterjet propulsion apparatus, the apparatus including a water intake section and a pumping unit including a bearing cartridge. The bearing cartridge is designed such that during operation a preload system provides tailoring betwee... | 01/15/2008 |
| 7267589 | System and apparatus for improving safety and thrust from a hydro-drive device A system and apparatus are disclosed for improving safety and hydro-flow thrust from a hydro-drive device. The apparatus may include a shroud having a first opening for the ingress of water, and a second opening for the egress of water, and a vane extending inward f... | 09/11/2007 |
| 7264519 | Safe efficient outboard motor assembly An outboard motor assembly for use as external propulsion for a watercraft includes a drive assembly, a shaft assembly, and a impeller-jet assembly coupled to the shaft assembly. The impeller-jet assembly includes an inlet stator, an exit stator, a impeller, and an ... | 09/04/2007 |
| 7238067 | Variable area pump discharge system A highly efficient watercraft propulsion system that operates continually submerged and relies on a non-circular variable area pump discharge opening which is configured, positioned and oriented so as to maximize the hydraulic reaction between the high velocity wate... | 07/03/2007 |
| 7229331 | Shroud for a hydro thrust device An apparatus is disclosed for improving safety and hydro-flow thrust from a trolling motor. The apparatus may include a first and second semi-circular portions configured to connect together to substantially enclose a hydro-drive device, and a semi-circular bracket ... | 06/12/2007 |
| 7172477 | Safety propeller A safety propeller for a boat motor includes an annular collar having a front opening, a rear opening and a continuous peripheral wall. A plurality of angled, horizontal slits are circumferentially positioned about the peripheral wall to allow water to pass through ... | 02/06/2007 |
| 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 |
| 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 |
| 7108569 | Axial flow pump or marine propulsion device A multistage axial-flow pumping or marine propulsion device having fixed or variable pitch stators between rotors. Stator vanes are designed to lower internal fluid speed without sacrificing total pressure as working fluid travels toward the discharge nozzle. A vari... | 09/19/2006 |
| 7094118 | Heat exchanger for a marine propulsion system The heat exchanger for a marine propulsion system is located within available space in front of the transom of a marine vessel and attached to the transom. The housing of the heat exchanger can be attached to a drive unit support structure and spaced apart from an e... | 08/22/2006 |
| 7056091 | Propeller hub assembly having overlap zone with optional removable exhaust ring and sized ventilation plugs A propeller hub assembly having a through-hub exhaust propeller hub characterized by an interior overlap zone defined by the composite interior dimensions of a selected number of conventional propeller hubs and optionally fitted with a removable exhaust ring and/or ... | 06/06/2006 |
| 7029343 | Steering arrangement for a ship propelled by waterjet The present invention relates to a steering arrangement for ships propelled by water jet, comprising a steering device (6) that is pivotal about an essentially vertical shaft (5) having a first center line (C1), at least one hydraulic cylinder (... | 04/18/2006 |
| 7021987 | Bottle rocket launcher A water bottle rocket system for launching single rockets, multistage rockets, multiengine rockets or multistage multiengine rockets. Rocket bodies are comprised of ordinary plastic beverage bottles. The propellant used is preferably water and compressed air. The sy... | 04/04/2006 |
| 7017505 | Ship with wave energy engulfing propulsors Presented is a water propulsion system for ships that enhances the efficiency of both the water propulsor(s) and the ship itself. This is accomplished by location of water inlet(s) for the water propulsor(s) to take advantage of water flow characteristics around a s... | 03/28/2006 |
| 7018250 | Ride plate positioning mechanism for personal watercraft, and method of using same A ride plate positioning mechanism for a personal watercraft can reduce the burden on an operator during assembly, and can also raise manufacturing productivity. In a ride plate positioning mechanism 30 of a personal watercraft 10, a portion of a botto... | 03/28/2006 |
| 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 |
| 6966271 | Waveless hull A vessel hull that does not create bow, stern, or transverse waves when moving through the water having an exterior surface that has a substantially constant cross-section along the length of the hull, and an interior surface that substantially encloses a flow chann... | 11/22/2005 |
| 6957526 | Pressure-actuated toy rocket system A pressure-actuated rocket system comprises a bottom base, a detonator and a rocket body. A top base is placed on a top surface of the bottom base. At least one through hole is located on a side of the top base and extended to an opening of the top surface. The holl... | 10/25/2005 |
| 6926566 | Method and apparatus for synchronous impeller pitch vehicle control An integrated propulsion and guidance system for a vehicle includes an engine coupled to an impeller via a driveshaft to produce propulsive force. The impeller includes a hub and a plurality of blades, wherein one or more of the blades is pivotably mounted to the hu... | 08/09/2005 |
| 6881110 | High-speed vessel powered by at least one water jet propulsion system without exhaust gas trail A propulsion system for a large watercraft, e.g., for a high-speed, military surface craft, includes at least one water jet propulsion device (water jet) beneath the vessel. An operating method of such a system includes propulsive energy by combustion engines, e.g.,... | 04/19/2005 |
| 6690300 | Marine engine throttle control method for single or twin engine applications An improved marine engine control methodology is utilized in either single or twin engine applications, and provides a safe and logical transitioning between manual and automatic operating modes. A standard software instruction set is installed in a micro... | 02/10/2004 |
| 6666736 | Water jet propulsion apparatus A water jet propulsion apparatus is provided with an impeller rotatably disposed in a duct forming a channel. A waterproof seal is provided between a collar provided around an impeller shaft rotatably supported within the duct and coupled to the impeller ... | 12/23/2003 |
| 6662549 | Propulsion system A propulsion system (163) having various applications one of which is as a marine drive system for watercraft. The propulsion system (163) comprises a flow passage (173) having an intake (175) for communicating with a source of working fluid such as seawa... | 12/16/2003 |
| 6568170 | Rocket with high pressure fueling module A rocket with a high pressure propellant module, comprising a toy bottle rocket that uses gases generated from the reaction between baking soda and vinegar. A mechanism controls the release of the gas formed by the chemical reaction and allows the gas to ... | 05/27/2003 |
| 6484491 | Hydrogen motor for water craft A system for propelling a watercraft using hydrogen. The system comprises a combustion chamber, an accumulator system, an ignition system, and a propulsion control system. The combustion chamber defines an upper portion and a lower portion. The accumulato... | 11/26/2002 |
| 6250071 | Housing for a disk propulsion system and a method of using the same A housing for a propulsion system, such as for a plurality of disks, is provided as well as a system and a method for using the same. The housing is shaped to provide a streamlined motion through a fluid, such as air or water. Openings in the housing allo... | 06/26/2001 |
| 6132270 | Pulsing reaction drive for water craft This invention concerns an internal combustion engine with a combustion chamber (8) for burning the working gas in an explosion stroke and, connected to the combustion chamber (8), a pump chamber (18) which can be filled via an input orifice (181) with a ... | 10/17/2000 |
| 5875627 | Fluid propulsion system for accelerating and directionally controlling a fluid A propulsion system for accelerating and directionally controlling a fluid having a continuous dynamic surface for circulating through a fluid from an entrainment region where fluid is introduced to the dynamic surface to a thrust region where fluid is di... | 03/02/1999 |
| 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 |
| 5679035 | Marine jet propulsion nozzle and method An improved discharge nozzle and method for operating a marine jet propulsion system are disclosed designed to allow the pump to operate more efficiently. The discharge nozzle includes an outer nozzle structure mounted immediately downstream of the pump d... | 10/21/1997 |
| 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 |
| 5501072 | Combined centrifugal and paddle-wheel side thruster for boats A thrust propulsion mechanism (10) for a boat (12) includes an outlet conduit (22) extending athwartships from a first outlet port (16) to a second outlet port (16') in the hull (18). A paddle-wheel impeller (24) is mounted within the hull for rotation ab... | 03/26/1996 |
| 5476401 | Compact water jet propulsion system for a marine vehicle The invention is directed to an improved water jet propulsion system for a marine vehicle. The water jet propulsion system of the present invention incorporates an unconventional and compact design including a short, steep, hydrodynamically designed inlet... | 12/19/1995 |
| 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 |
| 5333444 | Superconducting electromagnetic thruster An electromagnetic thruster for marine vehicles using a jet of water driven by the interaction of a mutually perpendicular intensified magnetic field and an intensified electric field is disclosed. The intensified magnetic field is produced by superconduc... | 08/02/1994 |
| 5325662 | Advanced exhaust discharge for pump jet propulsion apparatus An exhaust-through-the-hub system described herein includes an apparatus for discharge of exhaust gases from a marine outboard motor to the outer perimeter of an attached pump jet. Exhaust gas is ducted downwardly through the central body of the motor and... | 07/05/1994 |
