A steering wheel for a boat rudder, which can be mounted on a rudder actuating shaft, comprising a substantially circular body (2) with an external peripheral edge (3) for gripping by a user and a central hub (4) defining an axis of rotation (L), characterized in that the body (2) is formed by a plurality of circle portions (5) which are movable with respect to each other, so as to pass selectively from an open operative configuration, where the circle portions (5) are adjacent and contained in ...

A modular sponson for a small boat has discrete sections disposed in a series from the bow and along both sides to the stern. Each section has an axially extending length of tubing defining a longitudinal opening and a plurality of elongate pieces of closed cell foam material secured to the outside of the tubing for the length of each section. Flotation structure outwardly disposed from and in contact with the elongate pieces is covered by a protective covering that reaches inwardly to opposite ...

A method for damping of the rolling motion of a water vehicle, in particular roll stabilization of a ship with at least one propeller, comprising a rotating wheel body, which bears axis parallel blades on the outer circumference, the blades being pivoted around their longitudinal axis. The rolling motion of the water vehicle by modification of the pitch a thrust is generated which counteracts the rolling motion. The modification of the pitch for generation of a counterthrust takes place optional...

The present invention provides a first axial support that allows of the weathervane to rotate and a second axial support that prevents the weathervane from becoming dislodged from the first axial support.

A nautical transport vehicle includes at least one floating member, at least one longitudinal fin pivotally mounted on the floating member, and at least one corresponding plate mounted on the floating member and parallel with the longitudinal fin. Thus, the nautical transport vehicle is immersed in the water stably to form a balance support, so that the ship mounted on the nautical transport vehicle is flush rested on the water surface smoothly to obtain tension and buoyancy efficiently.

A hybrid propulsion system includes a main diesel engine for driving the marine turbine and an electric motor. The electric motor has a nominal output that constitutes at least 20% of the nominal output of the main diesel engine. The electric motor remains continuously switched on and maintains, together with a variable-pitch propeller, the main diesel engine at a favorable operating point. The combination of the main diesel engine and the electric motor also allows for a more economical design ...

A radial vane fluid motor or pump has an open ended tubular rotor having a cylindrical outer surface rotatably mounted in a tubular stator having its inner surface contoured to provide successive portions of increased and decreased spacing relative to the rotor body. A plurality of elongated movable vane assemblies are mounted on and project outwardly from the rotor surface to continuously contact the stator surface. Bearings support the rotor within the stator, and seals are provided for sealin...

A support system for a marine engine provides a plurality of mounts that have primary axes that are aligned in parallel relation with a piston symmetry plane of the engine. These primary axes of the mounts are also aligned with the central axes of the cylinders of the engine. This arrangement improves the damping function of the mounts and more effectively isolates engine vibrations from the marine vessel.

A cowling assembly for an outboard motor includes a top cowling and a bottom cowling for covering an internal combustion engine for an outboard motor. The top cowling is formed by pressing a nonferrous material. The top cowling includes an opening edge and attaching surfaces of an annular rail are secured to an inner side of the opening edge of the top cowling thereby reinforcing the opening edge and enhancing its mounting strength. Furthermore, a seal formed along an opening edge of the bottom ...

A bowsprit or davit assembly is for raising and lowering, and for firmly securing, an anchor. The assembly includes an elongate frame member, of a substantial U-shape in cross-section, adapted to be mounted on a surface (deck of a vessel). The, frame member includes respective front and rear U-shaped sections (2) and (1). The front section (2) includes respective first and second rotatable members (10) and (15) for receiving and guiding a rope or cable, the rotatable members (15) being displaced...