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Patent Searching and Data


Matches 401 - 450 out of 3,325

Document Document Title
WO/1992/012048A1
A device for producing thrust from an accelerated fluid flow comprises fluid acceleration means with drive blades (5) rotating in a stator (10) about an axis of rotation, a stationary shroud (7) centered on the axis and comprising a plur...  
WO/1992/007754A1
A steering and reversing system for a marine jet propulsion unit having a stationary nozzle (3) for discharging a water jet rearwardly from the unit comprises a pair of steering and reversing members (4, 5) which are mounted side by side...  
WO/1992/005621A1
A thrust generator which has a structure wherein a helical thrust duct (2) is rotatably supported inside a hollow portion of a superconductive magnet (1) of a solenoid coil type, positive and negative electrodes (8 and 9) are so bonded t...  
WO/1992/000221A1
A hydraulic pulse jet apparatus for propelling vehicles through aqueous media. Water is sucked into a chamber by means of a membrane, and a spring or air is compressed, whereafter the membrane returns to its starting position and forces ...  
WO/1991/009773A1
Water-jet drive for water craft with a nozzle whose effective cross-section can be altered depending upon the water flow rate to pump rotation speed = constant ratio, as can its effective direction of propulsion, the effective nozzle cro...  
WO/1991/007806A1
A thrust generator in which a spiral duct (2) is inserted in the hollow interior (4) of a solenoid-type superconductive magnet (1). A positive electrode (9a) is arranged on one side in the duct (2) and a negative electrode (9b) is arrang...  
WO/1991/005695A1
A vessel (10) has a semi-displacement or semi-planing round bilge hull (11) characterized by low length-to-beam ratio (between about 5.0 to 7.0) and utilizing hydrodynamic lift. The bottom (15) of the hull (11) rises toward the stern (17...  
WO/1991/004907A1
The invention defines a propulsion system (10) for an underwater vehicle (40). More particularly, the invention describes a turbo-hydroduct propulsion system which operates on stored, high energy fuel (48). The fuel is combusted and powe...  
WO/1991/001915A1
A magnetic field (B) and an electric field (E) with essentially mutually perpendicular field lines (37, 41) are produced in a tube (31) through which the surrounding water flows. The resultant force acts on the charge carrier located in ...  
WO/1990/015751A1
A pair of integrated water propulsion and hydrofoil systems (20) capable of moving through water at speeds of at least 20 miles per hour are disclosed. Each having a hydrofoil (26) and a mounting leg (28) removably secured to a water pro...  
WO/1990/015753A1
A water jet propulsion module (10) is generated about a central axis and has an inlet opening and a discharge opening concentric with said axis. The module includes a stator (14) having an inner wall and an outer wall with curved stator ...  
WO/1990/014265A1
A magnetic field (B) and an electric field (E) with essentially mutually perpendicular field lines (37, 41) are produced in a pipe (31) through which the ambient water flows. The resultant force is exerted on charge carriers located in t...  
WO/1990/011928A1
The main rotor (1) assembled at bow (3) of hull (4), crosswise to sheer plan, consists of two or more units of cylindrical wheels (5) provided with blades (17). Each unit of cylindrical wheels (5) is provided with its own independent bra...  
WO/1989/012741A1
An adjustable converging-diverging nozzle (10) includes a body (11) having a flow passageway (14) therethrough. The passageway is configured to define an entrance section (18), a narrowed throat section (19), and an exit section (20). Tw...  
WO/1989/009724A1
An MHD (magnetohydrodynamic) propulsion arrangement for ships or other marine vessels, in which the magnetic field is trapped in a closed path (B) by solenoids (51) and, optionally, magnetic shunts (52). The interacting current (I) is th...  
WO/1988/009288A1
The present invention briefly concerns a reversing device of a jet propulsion assembly for ships. The jet propulsion assembly comprises a steering means (20) connected to the outlet side of a pump (6), for steering the driving water jet,...  
WO/1988/009287A1
The present invention briefly concerns a jet propulsion assembly for ships, said assembly comprising a propeller pump of axial or semi-axial type. The propeller pump has a pump housing (6), the inlet side of which is connected to a water...  
WO/1988/005008A1
A water jet propulsion unit for watercraft includes a propeller pump housed in a pump housing (3) which has provided therein an inlet opening (3a) which is connected to a water delivery conduit (6) extending to a water intake opening (7)...  
WO/1988/002719A1
A boat propeller installation (1), in particular for motor boats, has a propeller driven at engine speed and provided with blades (5) having step bearings (7) that can pivot around threaded bolts (6) screwed into a propeller star wheel (...  
WO/1988/000903A1
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 channels (13) suitable for...  
WO/1987/003264A1
A body surrounded by a fluid is moved in a specified direction by a drive system (1) which creates a negative pressure by sucking in the fluid from the environment, increasing the speed of fluid flow in relation to the body by adding ene...  
WO/1987/001353A1
In order to make it possible to accelerate a fluid traversing the present device while avoiding important frictions and efficiency losses, the device according to the invention is essentially comprised of a combination of two main member...  
WO/1986/001483A1
A propeller drive with contra rotating propellers (3 to 6) where the shafts (13) of the outer propellers are supported by bearings inside the hollow shafts (14) of the inner propellers. The number of the propellers is at least four arran...  
WO/1985/004931A1
New system of rotary propeller pump for high speeds of revolution and high outputs, characterized in that the propeller is comprised of a single blade (S) on the shaft (1) or on the useful cylinder (6-6'). The linear speed and the flow r...  
WO/1984/003077A1
A jet propelled boat (10) whose propulsion unit is very compact vertically and in which entrance of the water into the exhaust system is effectively prevented. The jet propulsion unit includes an engine (42) having a vertical output shaf...  
WO/1984/001759A1
The hydro jet is comprised of a body (1), with propellor impeller (4), which sucks the liquid through the diverter ribs (9), and deflector ring (10). The liquid is accelerated through the diverter ribs (6), and diverter body (8), with in...  
WO/1984/001758A1
A turbo jet pump comprising a driven shaft (6) having, attached impeller blades (13), rotor blades (17) rotatable freely rotatable on shaft (20), the pumped liquid being forced past diverter ribs (14 and 21) at increasing velocity.  
WO/1984/001760A1
Hydro turbo jet comprising a body (1) having an impeller (10) having (13) blades which force induced liquid through diverter ribs (14), past reactor wheel (18) which freely rotates on shaft (20), past diverter ribs (21) and exits past di...  
WO/1983/000125A1
A hydrojet pump comprising a driven rotor (5) having three sets of longitudinally spaced blades, comprising compression blades (6), transfer blades (7), reactor blades (8), arranged to increase the velocity of the fluid admitted into the...  
WO/1981/001540A1
A power operated surfboard which has a raised rear hollow portion (13) at the rear in which is disposed an impeller housing (34) having an impeller (66) therein and a water discharge passage (69) extending rearwardly from the housing. An...  
WO/1981/000992A1
It comprises primarily an ejection tail (2) which allows by its rotation to manoeuver in all directions, both fowardly and rearwardly. The device may be used for all surface vessels.  
WO/1980/000948A1
Vessel having a chamber (1) which is watertight from the remainder of the interior of the vessel, a water inlet (7) in the hull of the vessel communicating with the interior of the chamber and steering and propulsion means comprising a c...  
JP2019196040A
[Subject] In a jet screw, it prevents a sleeve's changing and contacting an impeller, and raises maintenance nature. [Means for Solution] A jet screw is provided with the following. Impeller housing, Impeller, Sleeve, The 1st cyclic elas...  
JP2019171925A
[Subject] A small vessel which can perform operation of setting up individually a speed setting value and an acceleration preset value for a picture for speed setting and a picture for an acceleration setup simultaneously in the state wh...  
JP2019172093A
[Subject] The maintenance nature of the propulsive engine of a vessel is improved. [Means for Solution] A propulsive engine of a vessel concerning one embodiment is the interior-of-a-ship side from a principal axis which is a propulsive ...  
JP6557754B2  
JP2019123492A
To provide a vessel capable of creating a flat wake flow with little water splashing by suppressing influence of water flow by a vessel propulsion machine.A vessel includes a hull, a vessel propulsion machine, and a guide. The vessel pro...  
JP6542338B2  
JP2019107912A
To provide a small ship capable of suppressing the leakage of the driving sound of a propeller to the outside of a propeller housing part.A jet boat 100 (a small ship) comprises: a hull body 1; a jet propulsion machine 3; a propulsion ma...  
JP2019104390A
To provide a high mobility propulsion device for a vessel such as a low speed pilot boat which is comparatively small sized requiring a high level maneuvering performance such as a harbor work barge.A high mobility propulsion device for ...  
JP6528043B2  
JP6527570B2  
JP2019073285A
To provide an efficient, noise and cavitation reducing vessel screw, pump screw, or turbine screw for use in water or in liquid.A front side unit and a rear side unit are provided and water or other liquid is pushed from the front side u...  
JP6512694B2  
JP6505017B2  
JP6500309B2  
JP6500310B2  
JP6500308B2  
JP2019055671A
To provide a waterjet propulsion machine acting even when power generation ability of a main engine 920 is small by reducing difference between consumed power by an engine 951 and power generating ability of the main engine 920 by preven...  
JP6497996B2  

Matches 401 - 450 out of 3,325