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WO/1999/020523A1 |
An impeller (10) having flexible impeller blades (30) with a stiffness which allows the blades to flex into a backward-curved impeller configuration at the maximum intended rotational speed of operation, and to return to a more radial bl...
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WO/1999/015400A1 |
The invention relates to a marine propeller having a drive-source connecting means. According to the invention, the connecting means is included by a separate adapter element (8) detachably fastened to the propeller hub (1, 2). The inven...
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WO/1999/014112A1 |
An airfoiled blade (10) for improving the performance of a propeller is disclosed. The blade comprises a root portion, a tip portion, a leading edge (22) and a trailing edge. The blade has a cross section defined by a scaleable airfoil s...
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WO/1999/006272A1 |
A novel watercraft, which may include a hull with a keel, having a propulsion device extending below the water line comprising a pair of flappers (46, 48) each adapted to oscillate through an arcuate path in a generally transverse direct...
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WO/1998/046482A1 |
A propeller (11) having five blades (13) supported from a hub (14) is exemplified. The propeller (11) is shown with the faces (15) of those blades (13) facing the viewer (out of the page), and has apertures (19) extending through each bl...
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WO/1998/036966A1 |
A method of designing a mistuned rotor with improved stability and forced response includes selecting a system model that simulates aerodynamics of the rotor, applying a selected symmetry to the model, determining the correlation between...
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WO/1998/032652A1 |
Propulsion device comprising a number of profiled propeller blades (6) being circumferentially distributed and being mounted between two discs (4) rotatably arranged around a horizontal shaft (7) in such a way that the axes of the blades...
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WO/1998/021091A1 |
The present invention relates to a flow form to be used in gaseous or liquid moving fluids, comprising a leading edge (4) defining a dividing line for the flowing medium, two opposite lying surfaces (6, 7) along which the medium flows ov...
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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/1998/013591A1 |
Novel apparatus and methods for cooling a watercraft internal combustion engine (E) which supplies rotational force to a drive unit (D) attached to the watercraft (H) are described. The apparatus comprises a heat exchanger (10) connected...
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WO/1998/012104A1 |
The invention relates to a vertical axis and transversal flow nautical propulsor with continuous self-orientation of the blade comprising a plurality of blades (1), rotating about a vertical axis and supported by a blade (1) supporting p...
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WO/1998/007897A1 |
From the time that they are immersed into a marine environment, bronze propellers are prone to attack by marine organisms, such as barnacles, coral and algae, which attach themselves to the bronze metallic surface, creating lumps on the ...
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WO/1997/049603A1 |
This marine propulsion system makes it possible to develop a propulsive thrust by a symmetrically convex oscillating body, to exploit the cynetic energy of the flow moving past the two convex sides of the oscillating body by deflecting t...
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WO/1997/048599A1 |
A method and apparatus for continuously moving fluids, said method comprising the steps of inserting a symmetrical foil (5) in said fluid such that the leading edge of the foil (5) is perpendicular to the direction of selected movement; ...
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WO/1997/046402A2 |
A non-sinkable, easily re-rightable aquatic vehicle has a lightweight body with a front, a rear, a bottom and opposite sides and contains a seat for supporting a pilot. A pair of front sheaves are rotatably mounted to opposite sides of t...
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WO/1997/045319A1 |
Device for ships, independent of the principal propulsion system serving either as a passive rudder or as an active manoeuvring element, as desired, in which one or more longish vanes (3) mounted eccentrically, so that they can rotate ab...
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WO/1997/045317A1 |
A method and apparatus for providing reduced drag on a body moving in a direction D through a selected fluid medium at a speed U which is normally sufficient to cause turbulence. Reduced drag is generally accomplished by flexing at least...
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WO/1997/038897A1 |
A blade for ship propellers is provided in the area of its outer radius with means for reducing the induced turbulence. The means for reducing the induced turbulence consist of several ribs spaced apart and arranged next to each other in...
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WO/1997/037889A1 |
A novel profile is proposed for a hydraulic propulsion system blade intended for use in conditions of no cavitation and no ventilation and having a significantly higher efficiency, lifting force or cavitation-free flow indicators. The bl...
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WO/1997/029010A1 |
A water vehicle (10) which includes first (18) and second (46) foils which are at least partly submersible and which are removable, at least to a limited extent, relatively to each other.
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WO/1997/026181A1 |
According to the invention, an active rudder, which can be rotated through U 180� and is mounted at the stern of a watercraft (WF), preferably a sailing yacht, such that it can be moved into and out of an opening in the hull (100), tak...
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WO/1997/025109A1 |
Methods are disclosed for increasing lift and decreasing drag on hydrofoils and swim fins. The methods include providing a hydrofoil (104) with a highly swept back leading edge portion (108) and orienting the hydrofoil (104) at a signifi...
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WO/1997/019849A1 |
The present invention relates to a foldable propeller for a ship, comprising a hub (2) for mounting on a drive shaft of the ship, and at least two blades (1), each of which is pivotably arranged in the hub (2) between a first, essentiall...
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WO/1997/015489A1 |
A propeller (10) including: a hub (11) with a central axis of rotation (12); and three propeller blades (13) supported on said hub, the blades being mounted for pivotal movement about axes (14) extending substantially normal to the axis ...
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WO/1997/012768A1 |
The invention relates to a vehicle, especially amphibious vehicle for traffic on mainland, water or swamp, comprising a frame (2) and at least one wheel (3, 4). The essence of the invention lies in that the quotient (m/V) of the whole ve...
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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/1996/017769A1 |
A propeller (10) including a hub (11), a plurality of blades (13) extending outwardly from the hub (11) and part annular connecting elements (17) which interconnect tips (16) of adjacent blades (13). The trailing edges (21) of the elemen...
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WO/1996/005097A1 |
A three-dimensional object is disclosed which is formed from a plurality of sheets of a flexible substantially inelastic material. A portion of the perimeter of each sheet is joined to a portion of the perimeter of at least one other of ...
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WO/1996/000165A1 |
Apparatus for propelling watercraft. A plurality of pivotable paddles (24) are mounted on a pair of spaced apart slidable substrates (20, 22). The substrates (20, 22) are moveable within a pair of channels (16, 18) formed on opposing sid...
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WO/1995/026901A1 |
A watercraft (30) has floats (31, 32) supporting a bicycle-type frame (59), having handlebars (92) connected to a rudder (93) to steer the watercraft. A chain and sprocket foot operated drive (98) is connected to a shaft (112) journaled ...
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WO/1995/023088A1 |
This invention relates to a propeller for boats and ships, and more particularly, to a propeller which produces a higher thrust for a given power input. The higher thrust and efficiency of the propeller is based on the fact that the wate...
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WO/1995/018743A1 |
The proposed travelling belt propulsion unit comprises: a housing (1) made of individual sections (8) and a closed belt (6) surrounding the frame (1) with a space (10, 12) between itself and the frame. Pockets (15) are provided in the fr...
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WO/1995/017331A1 |
A propeller (1) for commercial vessels as well as sailing-ships with an auxiliary engine, having a hub (2) and at least two propeller blades (1) which are pivotally mounted in the hub (2). The blades (1) are pivotable between unfolded op...
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WO/1995/015882A1 |
A watercraft including flotation (1) and propulsion members, which propulsion members are two blades (2 and 3) hinged to a float. The floatability factor of the float is such that the volume of water displaced in the submerged position w...
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WO/1995/013959A1 |
A propulsion system for use in a fluid, the system utilizing at least one foil which is both oscillated at a frequency f with an amplitude a in a direction substantially transverse to the propulsion direction and flapped or pitched about...
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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/1995/012520A1 |
The invention relates to a rotary machine component especially with a flat housing or base with substantially cylindrical outer wall or with symmetrically distributed projections, especially in star array, and especially the rotor (1) of...
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WO/1995/011388A1 |
The surface (12) of a body (10) immersed in a fluid flow has projections (14) on the base surface. In order to design a more flow-favourable surface (12) of a body (10) immersed in a fluid flow and having projections (14) on the base sur...
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WO/1995/002535A1 |
The proposed propeller unit comprises a propeller shaft mounted in such a way that its position in relation to the hull can be adjusted both when the vessel is at anchor and under way. Propeller blades mounted on the shaft are shaped in ...
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WO/1995/000389A1 |
A watercraft with a float (1) provided with two paddles (2, 3) symmetrically arranged on either side of the axis (AB) corresponding to the straight line along which the craft is propelled. Each paddle is mounted at a certain depth on the...
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WO/1994/021914A2 |
A flow body with a hull (10) is provided with a steering or guiding apparatus consisting of shape-changeable side wall parts (12, 14) and an adjusting device (22) for adjusting the shape of the side wall parts (12, 14). The flow body is ...
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WO/1994/019234A1 |
A circular foil (10) connectable to a source of power for producing thrust in an axial direction when rotated, includes a flat circular plate (16) and a plurality of closely spaced apart fins (18) fixed to an upper face of the circular p...
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WO/1994/010032A1 |
The boundary layer of a fluid travelling in a mean-flow direction relative to a surface of a wall (100) of a body is controlled by generating in the fluid a magnetic field B(Boolean not) (103) having flux lines parallel to the surface of...
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WO/1994/003360A1 |
A nautical device can be propelled and steered by a standing user without the use of hands by twisting of the body to the right and left about a vertical axis. The device comprises a circular or ovoid floating platform (1), the submersed...
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WO/1993/024360A1 |
A propeller in particular for a ship has blades (2) each of which is pivotally arranged in the hub (4) of the propeller so that the blade (2) is capable of pivoting to and fro in an axial plane between forward and rearward positions (gam...
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WO/1993/011038A1 |
An aquatic craft (11) capable of manual operation which comprises at least one platform (13) to accommodate a rider and supporting handrail (18) associated therewith to allow for the rider to hold on to the craft (11). The platform (13) ...
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WO/1993/009027A1 |
A propeller for e.g. a ship has a central hub (7) with a plurality of propeller blades (8). Each blade (8) is composed of an elastomer, such as rubber (10), having a flexible core (9), which may e.g. consist of a relatively thin, corruga...
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WO/1993/009026A1 |
A propeller for e.g. a ship has a central hub (34) with a plurality of propeller blades (12). Each blade (12) is composed of a flexible elastomer covering (14) of e.g. rubber which is vulcanized firmly on a core (13). The core (13) and t...
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WO/1993/008075A1 |
Propelling/steering system suitable for use on watercrafts in general, that includes the following components: a rotor (2) [improved upon what was described and claimed in the previous invention by the same Applicant, deposited in Italy ...
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WO/1993/007051A1 |
A propulsion apparatus for a boat has a paddle member with a blade, the paddle member being connected to automated drive means, and which paddle member in use is pivotable about an axis. In such an arrangement, the force of the drive mea...
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