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WO/1998/025814A1 |
A pump frame (7) comprises a connection port (17) in an upper portion thereof, an inflow port (19) in a lower portion thereof, and a pumping flow passage (21) for providing communication between these ports, and is mounted to a ship bott...
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WO/1998/025815A1 |
A pump frame (7) is fixed to a ship bottom (1b) such that an inflow port (19) in a lower portion thereof is open in the water near a stern (1a). A mixed flow pump (8) is fixed to a pedestal (12) provided on the ship bottom (1b). A suctio...
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WO/1998/022337A1 |
A hydraulic system for the control of boats, ships and crafts in general that comprises nozzles (1, 2) opposed at the end of the stem, having a Venturi tube throttling (8) or an internal diameter reduction by means of flanges (10), so as...
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WO/1998/021090A1 |
A water jet propulsion unit suitable for use in outboard or stern-drive configuration in motor boats. The unit has an intake section, a pump section and a drive section within which is incorporated a pressure control device (35) and nozz...
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WO/1998/015453A1 |
A marine pump jet includes a rotor (132) located upstream and in front of the rotor drive mechanism. The lower unit (102) of the tractor pump jet has a rotor housing (106) which substantially surrounds the rotor (132) and a stator housin...
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WO/1998/015454A1 |
Disclosed herein is a jet propulsion unit (14) comprising a housing (41) including a wall (43) defining a water tunnel having therein a water outlet port (71), and a recess (81) located in the wall (43) defining the tunnel and in surroun...
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WO/1998/007620A1 |
A steering apparatus (1) for a water jet in a vessel (3), for lateral and reversible steering of a water jet (4) which is backwardly directed in relation to the vessel (3), comprises two flow profiles (6, 6') each of which is rotatable a...
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WO/1998/007619A1 |
In a method for maintenance of a water jet (1) provided in a ship, wherein the water jet (1) comprises a water inlet (2) which is in the form of a closed channel, leading from the sea (18) to a pump housing (3), a blocking body, preferab...
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WO/1998/007618A1 |
In a method for maintenance of a water jet (1) provided in a ship, wherein a water inlet (2) leads from the sea (18) to a pump housing (3) which contains at least a bearing arrangement (5) and an impeller (6), the pump housing (3) is div...
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WO/1998/003397A1 |
A water jet propulsion unit comprising an intake section (1), a pump section (3) habing a pair of counter-rotating impellers (6, 7) mounted side by side on parallel driving shafts (8, 9) in separate cylindrical passages (22, 23) through ...
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WO/1998/001338A1 |
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 ori...
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WO/1997/031819A1 |
An improved nozzle and method for operating a marine jet propulsion system are disclosed designed to allow the pump to operate more efficiently. The nozzle (60) includes an outer nozzle structure (62) which is mounted immediately downstr...
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WO/1997/031818A1 |
Fluid thruster apparatus comprises a rotary impeller (17) mounted within a first fluid flow control element (21), the impeller having blades which draw fluid radially into the swept volume of the blades and eject fluid radially, in which...
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WO/1997/029952A1 |
An improved inlet duct (17) for a marine propulsion system is dicslosed designed to allow the overall system to operate more efficiently. The inlet duct (17) includes a hydraulically efficient inlet tunnel (18) with a forward entrance op...
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WO/1997/026182A1 |
A marine propulsion system (48) rotor (39) is supplied with water over the majority of a lower semicircle of its rotation and air over the top half of its rotation. It is possible to vary the level of water flow into rotor vanes (40) of ...
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WO/1997/026183A1 |
Hub assembly for the journalling of an impeller (4) or drive shaft end (3) in the pump housing (2) of a water jet propulsion unit for propulsion of a vessel. The hub assembly forms a separate, integrated assembly (6) which as a single un...
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WO/1997/023382A1 |
An improved water jet propulsion system (10) for a jet propelled watercraft (89) is disclosed designed to operate more efficiently. The improved propulsion system (10) includes an adjustable water inlet duct (17), a larger pump (40) and ...
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WO/1997/009234A1 |
A thruster such as a marine thruster has a fluid inlet (12), a fluid outlet (13), a shroud (15), a fluid passageway (14), and an internal toroidal body (11) around which recirculating fluid (26) passes at high speed, the recirculating fl...
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WO/1997/000198A1 |
Arrangement for propulsion of seaborne vessels, especially high speed boats, wherein a paddle wheel (1) is fitted in a closed pump house (11) and acts like a waterjet impeller. Pump house and paddle wheel are formed to make the system ac...
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WO/1996/040555A1 |
A propulsion system for accelerating and directionally controlling a fluid having a continuous dynamic surface (40) for circulating through a fluid from an entrainment region (44) where fluid is introduced to the dynamic surface (40) to ...
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WO/1996/036979A1 |
A method and apparatus to amplify the magnetic field in an electromagnetic cirucit is provided. Amplification factors of several orders of magnitude may be obtained. The system is applicable to a number of different systems, including me...
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WO/1996/033909A1 |
A water jet propulsion machine for a marine vessel, having a suction port (4) at a ship's bottom in the vicinity of a stern, the water sucked from this suction port (4) into a suction duct (5) being pressurized by a spiral vane (10) prov...
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WO/1996/033910A1 |
An arrangement (10) for the reduction of wave-induced motions of a vessel having at least in part water jet propulsion is taught. The water jet engine comprises a nozzle (1) capable of being rotated about a substantially vertical axis (2...
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WO/1996/033091A1 |
A motorcycle-like configured watercraft (20) that employs a hull member (22) to receive an engine (72) and water jet nozzle means (82) to propel the craft and the craft includes a seat area (48) for a rider and steering means (28) to con...
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WO/1996/031937A1 |
A compressor (10; 100; 200; 300; 500) with a build-in reciprocating motor, comprises a cylindrical housing (20; 120; 210; 510) with two ends thereof fitted with tow opposing electromagnets (30; 130; 230; 530), each has a circular inner p...
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WO/1996/008408A1 |
A passive anti-clogging device (10) for feeding water into marine jet pumps, which displaces the laminar flow around the trailing surfaces of the intake port (16), such that foreign debris and grass are precluded from clogging the intake...
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WO/1996/005098A1 |
A hydrojet for ships that navigate even in shallow waters has a pump wheel (3) that sucks water in the vertical direction and is provided with blades that let the water flow out of the pump wheel in a direction between vertical and horiz...
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WO/1996/000684A1 |
An underwater two-phase ramjet propulsion unit includes an inlet (104) for receiving a flow of water, a compressed gas injector (132, 134) for injecting compressed gas into the flow of water, a mixing chamber (106) for mixing the compres...
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WO/1995/034467A1 |
A water-jet propulsion unit for a waterborne craft comprising a propeller pump having a pump housing (1) outside the outlet opening (2) of which there is provided a steering portion which makes possible the turning of the vessel as well ...
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WO/1995/029092A1 |
A kayak having a kayak-style hull (2) with one or more cockpits (6), and an inboard power device that accelerates water and directs it out a steerable stern nozzle (4). In the embodiment described, an internal combustion engine (18) driv...
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WO/1995/024338A1 |
A float member (10) has a top surface, a bottom surface, a front end and a rear end. A pair of elongated chambers (15) extend in the float member between the top surface and the bottom surface. Each elongated chamber has respective openi...
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WO/1995/020520A1 |
Described is a waterjet propulsion unit for water craft, the unit having a water pump (12) with stators (15, 16) fitted upstream and downstream of the pump to remove turbulence from the incoming water and from the waterjet produced by th...
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WO/1995/016606A1 |
Ship propulsion device, comprising a nozzle (1) secured to the ship, a pulsation unit (9) movably mounted in said nozzle, and an engine (2) for moving said pulsation unit in the nozzle, wherein said pulsation unit is movable into an open...
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WO/1995/013962A1 |
An intake for the water pump of jet propulsion units for waterborne craft. The intake comprises an inlet section (1) with a forwardly directed inlet opening (10) which is located under the vessel's bottom (4), and an outlet section (3) w...
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WO/1995/013961A1 |
The present invention relates to a fluid propulsion system having an outer shell (1) which provides bearing support, ducting and streamlining for a hollow inner propulsion rotor (5). The rotor (5) includes vanes (7) having a plurality of...
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WO/1995/003209A1 |
A multi-use watercraft (110) wherein a bay, or bays, is formed in the aft portion for docking a personal watercraft (PWC) (100). PWC (100) is connected to provide propulsion for multi-use watercraft (110) when so docked in the bay. Multi...
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WO/1994/029169A1 |
High speed boats can be operated and steered by a water jet which is generated by a pump the shaft of which is directly coupled to a driving motor (10). According to the invention the engine shaft and the pump hub shaft parallel to each ...
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WO/1994/025341A1 |
The object of the invention is to provide a new ship of that type which is driven by ejecting a water jet, whereat the pressure of the water jet driving the ship is utilized in a new way. To the ejector space (5) is connected an out-take...
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WO/1994/018458A1 |
An axial-flow pump combined with an electric motor coaxially arranged therearound. The rotor (1) and stator (2) are common to both the electric motor and the pump. The rotor comprises a central tubular portion (11) defining a central cha...
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WO/1994/012382A1 |
A stern drive system (10) includes a jet nozzle (14) that is pivoted with respect to a mounting bracket and is steered by two hydraulic cylinders (24, 34). An antirotation brace (60) includes a rod (64) pivotably mounted to the bracket (...
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WO/1994/008845A1 |
A water jet propulsion unit intended for use in jet boats, the unit comprising an intake section (10), a pump section (12) and a nozzle section (16). In the pump section (12) there are two counter-rotating impellers (14, 15) on concentri...
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WO/1993/021063A1 |
An improved thruster system (10) is provided for maneuvering and/or propulsion of a marine vessel (12), through the use of directionally oriented water jets discharged tangentially from a helical-conical flow chamber (18). The thruster s...
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WO/1993/018964A1 |
A swivelling nozzle for a hydrojet boat has integrated steering flaps (33, 34) arranged opposite each other and mounted so as to swivel around vertical axis bolts (31, 32). When the nozzle body (12) is swivelled around the vertical axis ...
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WO/1993/016915A1 |
A tunnel jet propulsion unit (11) for marine craft, wherein the passing water mass in the tunnel is converged by decreasing the cross-sectional flow area of the tunnel. The unit (11) comprises an intake section (1); an impeller section c...
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WO/1993/011994A1 |
An arrangement for driving a pneumatic boat designed as a built-on unit has a motor unit (M) and a pump unit (P) drivingly linked to the motor unit. The units are arranged on both sides of the front side (66) of a housing that encloses t...
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WO/1993/011998A1 |
A driving shaft (10) is disclosed for a hydrojet having a stator (21) and a rotor (20) enclosed in a housing (18, 19) with an inlet and an outlet nozzle. The bearing located upstream is designed as a force transmission member (K) that al...
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WO/1993/009024A1 |
A gullet for a personal watercraft which reduces water turbulence entering a hydro-jet propulsion system. The gullet (40) comprises an entry edge fin (38) having a blunt nose for improving hydrodynamic flow through the gullet. The nose h...
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WO/1992/020573A1 |
This invention relates to a marine jet drive having improved operation, especially in regard to having efficient adaptation to propulsion engine (7) and hull design; having a drive shaft (6) with flexible coupling (33, 34) at each end, i...
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WO/1992/019495A1 |
A propulsion device is provided for propelling and steering marine vessels of all kinds, whether on the surface or underwater. The device includes a pump with a fixed body (P) and circular and concentric inlet and outlet openings at the ...
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WO/1992/017366A1 |
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 7.5) and utilizing hydrodynamic lift. The bottom (15) of the hull (11) rises toward the stern (17...
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