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8157604 |
Electrical linear motor for propulsion of marine vessel
An electrical linear motor for propelling a marine vessel through a liquid medium, comprises a housing secured to the marine vessel and submerged in the liquid medium, an insert within the housing...
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7930875 |
Jet-type steam engine
In an engine, a rotor having a folded jet pipe is rotatably supported in a sealed container filled with a liquid. A heating portion is inserted in a center cylinder at the center of the rotor, and...
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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...
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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...
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7841166 |
Jet-type steam engine
A simply constituted steam engine efficiently obtains mechanical energy not only from a heat source of a high temperature but also from the exhaust heat of an internal combustion engine and various...
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7604520 |
Electrical linear motor for marine propulsion
An electrical linear motor for propelling a marine vessel comprises a thruster assembly disposed within a guide tube. Permanent magnets are attached to the thruster assembly and placed in close...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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5863229 |
Variable venturi
The invention relates to a variable venturi for a watercraft vehicle or similarly powered vehicle which allows the operator of the vehicle to selectively choose to operate a watercraft vehicle for...
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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...
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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...
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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...
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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...
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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...
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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...
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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....
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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...
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5277631 |
Vane arrangement for a water jet propulsion assembly
A water jet propulsion assembly for a jet ski-type watercraft includes an annular duct including a first section within which an impeller is located, a second section having a group of sloping vane...
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5239821 |
Underwater turbojet engine
A solid particle fuel is introduced into a reaction zone of a continuous w conduit between pump and turbine flow sections thereof within a turbojet engine. The fuel reacts on contact with the...
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5222863 |
Turbine multisection hydrojet drive
A hydrojet turbine drive 10 is described with a first turbine assembly 40 including a first compressor rotor 46 with blades 48 having a water pitch for drawing water into the turbine drive 10. The...
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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...
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5184966 |
Adjustable jet propulsion unit for watercraft
A jet propelled watercraft that is pivotal about a transversely extending horizontally disposed axis for raising the jet propulsion unit from the body of water in which it is operating and also for...
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5099764 |
Propulsion unit fireable from an enclosure
A recoilless propulsion unit fireable from an enclosure utilizes a releasy sealed multi-holed nozzle member to expel a fluid therefrom by a closed-breech type piston that is activated by a...
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5072579 |
Marine vessel thruster
A ductless wall thruster for a marine vessel has a housing with a plenum chamber therein and, at a forward end of the housing, at least one inlet opening surrounding an outlet opening. An impeller...
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4931026 |
Jet propeller
A jet propulsion engine submergible in water for driving a water craft wherein a drive shaft is connected to an internal combustion engine for rotation thereof. A first turbine is mounted on the...
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4917637 |
Waterjet propulsion system for watercraft
A waterjet propulsion system for a watercraft including a duct disposed on the bottom of the watercraft with the opening facing backward, a device to produce waterjet in the duct and a steerable...
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4897995 |
Liquid turbojet engine
A liquid turbojet engine includes an elongated shaft, a housing mounted about the shaft with the shaft being rotatable relative to the housing about the shaft longitudinal axis, a conduit fixed to...
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4884985 |
Elastically supported thruster structure
A propeller thruster installation includes a propeller unit rigidly supported in an inner tunnel tube which in its turn is elastically coaxially supported in an outer tunnel tube which is rigidly...
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4843814 |
Assembly for producing a propulsive force
A body surrounded by a fluid is moved in a predetermined direction by a driving unit (1) which produces a negative pressure, whereby the fluid is sucked from the environment, the velocity of the...
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4838821 |
Drive mechanism particularly for flat-bottomed watercrafts
A drive mechanism particularly for flat-bottomed watercrafts with at least one centrifugal pump or the like producing a water jet, which pump is arranged closely above the intake opening within the...
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4775341 |
Foil system for jet propelled aquatic vehicle
Water directing apparatus for the jet pump inlet of a watercraft having a planing surface within which the inlet is formed. The apparatus is carried by the planing surface and includes a pair of...
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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...
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4735045 |
Limited discharge bidirectional thruster and method of operation
A thruster for use underwater having a rotor which may be optionally rotated either clockwise or counterclockwise. The rotor includes blading, perferably radially symmetrical about the rotor radius...
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4726183 |
Self retracting screens for turbomachinery
A self retracting screen for turbomachinery comprised of a number of interlocking wires, the wire ends being pivotally attached to the periphery of the normal inlet of the turbomachinery....
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4718870 |
Marine propulsion system
A marine propulsion water jet system which operates at high efficiency and automatically adjusts itself to maintain a relatively constant primary injection water velocity over a wide speed range....
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4713027 |
Ringed impeller for a water jet drive
An improved rigid impeller held for driven rotation within the housing of a water jet drive for boats. The impeller includes a hub connectable to the output shaft of a motor, a plurality of...
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4694645 |
Propeller assembly
A propeller assembly, a so-called rotatable thruster, for propelling, manoeuvering, steering and/or positioning a watercraft, floating docks, pontoons and in particular offshore platforms, includes...
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4643685 |
Water jet propelled craft
A water jet propelled craft equipped at the rear section of the craft with a water jet pump driven by an engine. A cylindrical member is provided so as to extend backwards around the rear end of a...
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4605376 |
Marine jet propulsion unit
The marine jet propulsion unit of this invention, in preferred form, has a pair of laterally adjacent blade carriers, each having a vertical outer surface movable in a horizontal orbit and to which...
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4596117 |
Hydrojet
A gas powered engine for use in combination with a pressurized gas source to propel the gas powered engine through a fluid medium such as water comprising an engine housing having a plurality of...
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