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WO/1993/015950A1 |
A double propeller arrangement for a marine propulsion unit, for example of the type which includes a so-called stern-drive (1). Each propeller (4, 5) has a hub (8, 9) consisting of an inner sleeve (10, 10') with splines for attachment t...
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WO/1993/015952A1 |
A propeller with a hub (10) affixed to a propeller shaft (3) so as to rotate therewith, which hub is axially locked by a locking arrangement consisting of a lock nut (34) screwed onto the shaft and a lock screw (35) screwed into the end ...
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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/1993/005317A1 |
Transmission for boats, comprising an input shaft (2), a reversing mechanism and an output shaft (3). The reversing mechanism is comprised in a right angled bevel gearing with two bevel gears (7, 8), which are freely rotatably mounted on...
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WO/1993/002913A1 |
This invention is a paddlewheel apparatus having epicyclic gear trains (22, 28, 29, 30, 31, 32, 33) in rotatable holders (H) at opposite ends of a plurality of paddles (A, B, C). The paddles (A, B, C) are maintained substantially vertica...
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WO/1993/001085A2 |
Marine propulsive device (1) comprising two concentric and contra-rotating propellers (5, 6), rotating at the same speed but in opposite directions, with reversed pitches, said propellers (5, 6) being driven by two primary shafts (3, 4) ...
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WO/1992/022459A1 |
a low-aspect ratio propeller system is provided with a multiple ring structure (42) formed with a plurality of circular or non-circular, annular, narrow equivalent air foil rings (56.1, 56.2, 56.3, 56.4) which are held by rails (40) in a...
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WO/1992/020574A1 |
The invention relates to an outboard boat propeller drive unit with an anti-cavitation plate (6) above the propeller or propellers (4, 5). Through the anti-cavitation plate there extends an exhaust duct (7) with its outlet port (11) loca...
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WO/1992/009476A1 |
The invention concerns a device for setting the propulsion means (22) of watercraft in an arbitrary angular position within the perimeters of an imaginary conical configuration (k) with one end of the propulsion means (22) attached to th...
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WO/1992/009475A1 |
An arrangement in a steering and propulsion system for a planing type motorboat (10), which boat is provided with means (16, 18, 19) for adjusting the trim position. The steering characteristics of the boat are improved by providing the ...
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WO/1992/009474A1 |
A device, such as a boat hull and propulsion system, for effecting relative movement of a flowable substance, such as water. A channel having open upstream and downstream ends at least partially defines a flow path. The channel includes ...
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WO/1992/006000A1 |
A drive unit (23) for a watercraft (20) comprising a surface propeller (25) for partially submerged operation and means for affixing said unit (23) to the transom (56) of the craft (20) wherein the propeller (25) is located aft of the tr...
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WO/1992/003335A1 |
A propeller system for an outboard motor, comprising a revised propeller (9), a symmetrical Kort accelerating nozzle (6), and re-routed exhaust passages (B), (C), is described. This system permits modification of a standard outboard moto...
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WO/1992/000875A1 |
Apparatus shears foreign matter such as lines, wires, nets and weeds that can entangle and befoul propellers (5), propeller shafts (2), bearings and related structures of propeller-driven, water born vessels. The apparatus shears by coop...
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WO/1991/019644A1 |
An arrangement in a swingable turn-up inboard/outboard stern aggregate (1) for craft with an inboard engine and an outboard driving means (2) comprising a screw (5), where the inboard driving shaft (3) of the stern aggregate (1) for conn...
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WO/1991/005696A1 |
The general field of the invention relates to hydrofoil supported vehicles, and an asymmetrically arranged hydrofoil (36) and propeller (28) system is disclosed for improving the speed and lift of watercraft (22) such as amphibious vehic...
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WO/1990/015750A1 |
An improved watercraft and propulsion system is disclosed for moving a watercraft such as an amphibious vehicle (20) or a speed boat (70) from 0 velocity to speeds in excess of 20 miles per hour. Each watercraft includes water propulsion...
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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 ...
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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...
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WO/1990/008061A1 |
This invention relates to a marine propulsion apparatus. To improve propeller efficiency by utilizing the flow in the backward direction of a propeller shaft and the flow turning in the rotating direction of the propeller, the present in...
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WO/1990/008271A1 |
In a device for contra-rotating two concentric shafts, one of which is hollow in order to accommodate the other, by means of at least one drive shaft which is connected to a power source, said concentric shafts are connected to each othe...
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WO/1990/006883A1 |
An apparatus (11) for automatically raising and lowering boat motors (17) includes a mounting configuration (21) that allows the motor to move up out of the water and down into the water. A hydrofoil (23) is connected with the motor. Whe...
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WO/1990/006256A1 |
A marine propulsion drive apparatus, generally referred to as a boat or vessel drive, for an inboard engine and of the type in which the input drive shaft (18) with the propeller shaft (20) extends through the stern (1) of the boat, and ...
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WO/1989/012572A1 |
This invention relates to a propulsion efficiency improving apparatus for ships, used to improve the propulsion efficiency of a propeller of a ship and a propeller of an outboard motor of a small-sized ship. This apparatus consists of a ...
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WO/1989/011998A1 |
Double nozzle consisting of a main nozzle (1) and a flap nozzle (2), coaxially located and operating in conjunction with main nozzle (1), comprising an opening (6) formed between the two nozzle profiles by the thin part (1a) of main nozz...
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WO/1989/010299A1 |
An arrangement in connection with an azimuth propeller for ships to measure the angle between the rotational axis of the propeller and the longitudinal axis of the ship (azimuth angle), and the angle of attack of the propeller blades. Th...
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WO/1989/009342A1 |
The machine as described has one vane (12) formed as a hollow spiral and at least one blade (11) located around the rotation axis of said machine, contained in a circular casing (14) surrounding the rotor externally, comprising: said bla...
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WO/1989/008580A2 |
The present invention comprises a set of asymmetric pre-swirl vanes and a matched propeller, the vanes being located asymmetrically around the propeller disc. Most of the vanes are located on the side of the disk where the propeller is o...
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WO/1989/008044A1 |
A marine drive unit (1) includes a lower gear case (8) forming a torpedo housing (9). A pair of coaxial propeller shafts (21, 25) are rotatably mounted in the housing and carry a pair of propellers (10, 11) thereon. The propeller shafts ...
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WO/1989/008045A1 |
A marine stern drive for a boat (3) includes a propeller assembly (36) having a carrier (13) for a pair of centric drive shafts (12, 19) to which are mounted a pair of closely adjacent fore and aft coaxial surface piercing propellers (21...
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WO/1989/008050A1 |
A marine drive unit (1) includes a lower torpedo housing (9). At least one propeller shaft (21) is mounted in the housing for rotation about a drive axis (17). The propeller shaft is driven by a driving gear (16) suitably connected to a ...
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WO/1989/003341A1 |
The proposed propulsor comprises, a main engine, a fixed tubular part (A3, A5, A7), a main transmission (AD4, AD1, BD1, BD2) which ends with a substantially vertical shaft (BD3) which operates a bevel gear pair (BD12-BD13) on the substan...
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WO/1988/005009A1 |
Mechanism based on reducers and intended to obtain on two rotary shafts which are coaxial or have any direction two torques equal in intensity and reverse as to the rotational direction without transmitting any torque to the support fram...
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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 (...
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WO/1987/003856A1 |
A device for cutting lines liable to foul a propeller has a stationary cutting blade (24) and rotatable cutting blades (30, 32, 34). Cutting edges of the blades are formed with saw-tooth serrations. The blades are curved in their plane o...
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WO/1987/002325A1 |
Two centrifugal pump and paddle boat propulsion devices (2) are mounted in astern outboard positions on two swingable vanes (3), respectively, projecting aft of a boat hull (1), spaced athawrtships of the hull (1) and swingable from posi...
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WO/1987/001350A1 |
A marine craft (10) having a propeller tunnel (20) in which the sidewalls (31) of the tunnel are essentially parallel and vertical and mate with a descending upper surface of the tunnel which optionally can be divided into a transom plat...
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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...
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WO/1986/001174A1 |
A thrust augmenter for a propeller fluid drive (11) comprising a hollow substantially cylindrical body (12) having an open rear face (15) which is part circular or circular and is located closely adjacent and ahead of the propeller (11) ...
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WO/1985/005085A1 |
A propulsion device for ships, in which a main propeller (1) and an auxiliary propeller (3) behind the main propeller (1) are provided coaxially via planetary gears (5). The planetary gears (5) consist of a sun gear (6) provided on an ex...
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WO/1985/003270A1 |
A device in fluid pressure generators comprising an annular casing (4) which is peripherally mounted and driven in a through-flow channel (1). The inner face of said annular casing forms part of the wall of the through-flow channel. The ...
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WO/1985/000572A1 |
A self-propelled waterborne vessel has a generally flat hull undersurface aft of the bow region from which extend side walls (10) and keels (11, 12) defining longitudinally extending channels (8, 9) of which the length approximates to on...
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WO/1984/003478A1 |
The mounting of a thruster propeller unit (18) in the bottom plating (23) of a vessel is facilitated by the use of lifting lines (26), operable from within the vessel. Each line is made to pass a lock chamber (27) adjacent to an opening ...
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WO/1982/000811A1 |
Motor boat with two hulls (2, 22) comprising a superstructure (3) fixed to said hulls (2, 22) Motors (4) actuate propellers (7) fixed at the front part of the hulls (2, 22) in the space located between said hulls (2, 22). The aerodynamic...
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WO/1981/000389A1 |
A modification on a rudder for boats and ships, comprising a channel disposed rearward of the screw which is rotatable about a substantially vertical axis. The channel has a closed, circular cross-sectional configuration. Two V-shaped no...
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WO/1981/000242A1 |
Propulsion means for a vehicle capable of floating (10) comprising an engine and a further driving shaft (12) for one or more propellers (20, 21).The propellers (20, 21) are articulated about a horizontal axis which is perpendicular to t...
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JP2024046305A |
[Problem] To obtain a large steering angle while suppressing the increase in size of an outboard motor. An outboard motor includes a first housing, a second housing, a propeller shaft, and a steering mechanism. The second housing is supp...
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JP2024046306A |
[Problem] To obtain a large steering angle while suppressing the increase in size of an outboard motor. An outboard motor includes a first housing, a second housing, a propeller shaft, and a steering mechanism. The steering mechanism ste...
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JP7452214B2 |
There is provided a ship propulsion machine including: a drive shaft; a drive gear fixed to the drive shaft; a front gear meshed with the drive gear; a rear gear meshed with the drive gear; a rear propeller provided on an inner propeller...
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JP2024032427A |
An object of the present invention is to reduce the work burden of setting initial setting control parameters and shorten the work time. [Solution] A ship maneuvering system (1) is employed in a ship equipped with left and right propulsi...
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