Abstract: A ship includes a main propeller; a pod propulsion unit; and a rudder plate. The main propeller, the pod propulsion unit and the rudder plate are arranged on a hull centerline in this order. The pod propulsion unit includes a pod propeller; and a strut. The main propeller and the pod propeller configure a contrarotating propeller. When rudder angles of the pod propulsion unit and the rudder plate are zero, at least a part of a front end of the rudder plate is in front of a rear end of the casing.

Abstract: The present invention refers to a temperature control system for an electrochemical voltage source. It is planned that the temperature control system comprises a fluid moving device for moving a fluid for controlling the temperature of the voltage source.

Abstract: A rudder propeller with an underwater mechanism including a planetary gearing, the planetary gearing including a sun gear, a fixed internal gear and planetary gears, mounted between the sun gear and the internal gear and running on planetary axles of a planet carrier, wherein the planetary gears are mounted on the planetary axles by hydrodynamic slide bearings.

Abstract: A watercraft and controller are disclosed. An embodiment includes a controller for the water craft being configured to operate at least one drive propeller of the drive system of the watercraft below a first propeller rotational speed according to a first operating state by operating at least one drive motor, connected to the at least one drive propeller, via a first alternating voltage; and operate the at least one drive propeller above the first propeller rotational speed according to a second operating state by operating the at least one drive motor via a second alternating voltage. In a transition from the first into the second operating state or vice versa, the first internal combustion engine is operated at such a rotational speed that the at least one drive propeller is driven at the first propeller rotational speed, and the first alternating voltage is synchronized with the second alternating voltage.

Abstract: This disclosure provides improved nautical craft that can travel and navigate on their own. A hybrid vessel is described that converts wave motion to locomotive thrust by mechanical means, and also converts wave motion to electrical power for storage in a battery. The electrical power can then be tapped to provide locomotive power during periods where wave motion is inadequate and during deployment. The electrical power can also be tapped to even out the undulating thrust that is created when locomotion of the vessel is powered by wave motion alone.

Abstract: A propulsion system, for use by a swimmer in both on-water and under-water applications, includes at least one power supply unit attached to a sleeve secured about and to a forearm of the swimmer, at least one corresponding propulsion unit including a motor and an impeller, the propulsion unit offset from the forearm near to the wrist and away from the head of the swimmer, and control elements that actuate the power and propulsion units. One control element includes a grip upon the flexion axis of the swimmer which controls pitch of a longitudinal axis of the propulsion unit relative to a forearm of the swimmer, the control elements include a pivotally secured bracket, and elements for control of the level of power provided to the propulsion unit, in which the rotation and control elements are both positioned for ease of accessibility by a hand of the swimmer.

Abstract: A vertical travel assistance unit for a trolling motor in which the vertical travel assistance unit is attached to the shaft of the trolling motor by at least one mounting bracket or clamp and is attached to the trolling motor boat mount by at least one mounting bracket or clamp. A power cable connects the trolling motor and the vertical travel assistance unit to provide power to the actuator of the vertical travel assistance unit, which permits the vertical travel assistance unit to raise or lower the trolling motor along a vertical axis and wherein the vertical travel assistance unit, having an actuator comprising an actuator shaft; motor shaft and the trolling motor shaft moves up and down when the actuator shaft moves up and down.

Abstract: A watercraft includes a stern flotation compartment. The hull is carved out underneath the gunwales to admit a vertical cylindrical sleeve extending through the flotation compartment from top to bottom, and sealed top and bottom. A studded vertical mounting tube carrying an electric motor fits within a slotted cylindrical steering tube; the latter is carried on rotatable bearings affixed to the vertical cylindrical sleeve. A steering assembly is affixed to the slotted cylindrical steering tube and a guide tube fits closely within the vertical mounting tube. An electrical power cable is connected to the electric motor and a retraction assembly is affixed to the electric motor.

Abstract: A vessel includes a cargo tank storing LNG, a main engine and a sub engine using the LNG stored in the cargo tank as fuel, and a liquefied gas treatment system which includes: a main BOG supply line configured to compress the BOG generated in the cargo tank by a compressor and supply the compressed BOG to the main engine as fuel; a sub BOG supply line configured to compress BOG generated in the cargo tank by a compressor and supply the compressed BOG to the sub engine as fuel; a main LNG supply line configured to compress the LNG stored in the cargo tank by a pump and supply the compressed LNG to the main engine as fuel; and a sub LNG supply line configured to compress the LNG stored in the cargo tank by a pump and supply the compressed LNG to the sub engine as fuel.

Abstract: Watercraft automation and aquatic data utilization for aquatic efforts are disclosed. In one aspect, an anchor point is obtained and a watercraft position maintenance routine is actuated to control the watercraft to maintain association with the anchor point. In another aspect, prior aquatic effort data is obtained in association with an anchor point. In yet another aspect, current aquatic effort data is generated in association with an anchor point. In still another aspect, current aquatic effort data and prior aquatic effort data are utilized for prediction generation. In yet another aspect, current aquatic effort data and prior aquatic effort data are utilized to obtain another anchor point for a watercraft.

Abstract: In one technique of the present invention, DC electric power from a DC bus is inverted to provide AC electricity to one or more electrical loads, and AC power from a power generating device is rectified to provide a first variable amount of electric power to the DC bus. This technique also includes determining power applied to the electrical loads, and dynamically controlling the amount of power supplied from the power generating device and an electrical energy storage device in response to the power applied to the loads.

Abstract: There is provided an axial gap type generator exhibiting improved precision in positioning stator cores. An axial gap type generator comprises a generator case fixed to a crank case of an engine, a rotor yoke housed inside the generator case, and fixed to a crankshaft of the engine, and a first stator core and a second stator core fixed to generator case inner faces, and disposed flanking the rotor yoke in a rotation axis direction. The generator case is configured through direct connection of a first member to which the first stator core is fixed and a second member to which the second stator core is fixed.

Abstract: The present invention provides an electric-powered drive system for coupling to a hull of a watercraft. The electric-powered drive system includes one or more mounting units; a first support members, a second support member, a propeller shaft, a propeller coupled to the distal end of the propeller shaft; and a rudder.

Abstract: The present patent application provides a wind turbine with variable blade pitch. The wind turbine with variable blade pitch includes a turbine shell coaxially disposed at a turbine axis; and at least three evenly distributed blade handle bases fixedly disposed at the outer circumference of the turbine shell. A blade handle axis is coaxially configured on each blade handle base. A blade is fixedly disposed on each blade handle axis. A centrifugal blade pitch changing unit is disposed on the turbine shell and configured to adjust the rotation speed of the wind turbine. When the rotating speed of the wind turbine exceeds the rated rotating speed, it is regulated by the centrifugal blade pitch changing unit, so as to avoid the rotating speed of the wind turbine to be greatly increased due to the wind speed rise and make the wind turbine run stably at the rated rotating speed.

Abstract: Systems and methods for mounting and controlling a motor on a kayak are disclosed. A motor may be mounted to a kayak by a single interface on the kayak and rotated using foot pegs. The control system provides for responsive input and automatic directional stabilization of the motor.

Abstract: This invention relates to an amphibious vehicle and especially to an amphibious vehicle having twin internal combustion engines propelling the vehicle in water with a pair of water jet drives and propelling the vehicle on land with one of the same engines having an electric generator powering a pair of electric motors each coupled to a track assembly. Each electric motor and each air brakes are controlled separately to steer and brake the track assemblies.

Abstract: Disclosed herein is a propulsion apparatus for ships. The propulsion apparatus, which includes a front propeller and a rear propeller to rotate in opposite directions and provides propulsion power to propel a hull of a ship, includes a power unit to supply power to rotate the rear propeller, a main shaft to transfer the power supplied from the power unit to the rear propeller, a hollow shaft extending in a longitudinal direction of the main shaft to allow the main shaft to pass therethrough and coupled to the front propeller, a drive motor including a rotor coupled to an outer circumferential surface of the hollow shaft and a stator supported by the hull, the drive motor rotating the hollow shaft in a direction opposite to a direction of rotation of the main shaft, and an electricity supply unit to supply electricity to the drive motor.

Abstract: A water vessel having variable geometry is described. The water vessel comprises: a frame; a plurality of hulls coupled to the frame, each one of the plurality of hulls coupled to the frame by a folding mechanism and configured to move, relative to the frame, between a deployed configuration and a stowed configuration in which at least one dimension of the water vessel is reduced in respect of the deployed configuration; a plurality of thruster assemblies configured to provide thrust to the water vessel, each one of the plurality of thruster assemblies being coupled to a respective one of the plurality of hulls; and a protective device coupled to a respective one of the plurality of thruster assemblies, the protective device for preventing intake of foreign objects into the respective one of the plurality of thruster assemblies.

Abstract: A scuba tank accessory unit improves the diver experience by providing a streamlined diving unit for a back mounted diving device. The diving unit has a propulsion unit having a space for mounting a battery powered electric motor, armature extending out one end of the propulsion unit and further attached to a propellor. A battery pack is contained in a housing unit located either concentrically about the electric motor or atop it such that the electric motor extends slightly therein with a depression or cavity at the bottom of the housing unit.

Abstract: A passively stable personal hydrofoil watercraft that has a floation device, wherein a user can ride in a prone, kneeling, or standing position. The watercraft includes a strut having an upper end interconnected with the flotation device and lower end connected with a hydrofoil. The hydrofoil greatly reduces the power required to travel at higher speed. The watercraft also includes a propulsion system connected to the hydrofoil. Both longitudinal and directional control of the watercraft is via weight shift, eliminating the need of any movable surfaces. The floation device, strut, and hydrofoil may be permanently interconnected or may be detachable.

Abstract: A marine outboard engine has an engine, a cowling, an alternator, and a controller electrically connected to the alternator. A primary charger is electrically connected to the alternator and is adapted to charge a primary energy storage device. A starter motor is selectively operatively connected to the engine and is adapted to be electrically connected to the primary energy storage device. An auxiliary charger is electrically connected to the alternator and is adapted to charge at least one auxiliary battery adapted to power an auxiliary device. The controller, the primary charger and the auxiliary charger are disposed inside the cowling. A vehicle bus connects the auxiliary charger with the controller to provide data from the controller to the auxiliary charger. A watercraft having the marine outboard engine and an auxiliary device is also disclosed.

Abstract: An activation and deactivation assembly for an electric outboard motor with an internal motor controller, a tiller arm, a handle mounted on the tiller arm, and a rotating knob attached to the distal end of the handle. The knob has a longitudinally aligned key slot that receives a complimentary shaped key. Located inside the handle is a reed switch and mounted on the key is a magnet that is magnetically attracted to the reed switch. An optional lanyard attaches the key to the tiller arm, an optional dead main lanyard is attached to the lanyard, and a linear hall effect sensor is located in the handle.

Abstract: An electric steering apparatus for a vessel propulsion apparatus includes a steering motor, a lock clutch, and a rotation stopper mechanism. The steering motor generates a driving force to turn the steering shaft joined to an outboard motor. The lock clutch transmits a driving force from an input shaft to an output shaft when a forward input to transmit a driving force from the steering motor is generated, and shuts off the driving force transmission from the output shaft to the input shaft when a reverse input to transmit a driving force from the steering shaft is generated. The rotation stopper mechanism is configured to switch between a lock state in which the rotation stopper mechanism restricts rotation of the casing and a release state in which the rotation stopper mechanism releases the rotation restriction of the casing.

Abstract: A self-propelled personal watercraft. The watercraft includes a hull with a middle narrower than a bow and a stern of the watercraft and with a bottom of the bow being raised with respect to the middle and the stern, and a propulsion device within the hull. While the watercraft is propelled through water by the propulsion device with a rider on board, shifting of the rider's weight to either side of the watercraft increases contact of the bow with the water on that side, the increased contact resulting in increased drag and turning the watercraft to that side. While the watercraft is propelled through water by the propulsion device with the rider on board and the watercraft is not turning, the bottom of the bow makes contact with the water across a narrower distance than the bottom of the middle.

Abstract: Disclosed herein is a self-propelled personal water craft including a parabolic hull. The hull has a bow, mid-section and stern. The mid-section has substantially reduced diameter compared with the bow and stern section defining an hour-glass hull shape. The hull including an upper portion and a lower portion, a hollow space is created between the upper and lower portions and defines a central portion. The lower portion includes structure for manipulating water drag. Additionally, the craft includes a motor member for propelling the craft. In an exemplary embodiment, the motor member includes an axial flow jet pump.

Abstract: A propulsion device for a marine vessel, the propulsion device comprising an electrical machine with integral magnetic gearing, which comprises three members, namely a first or inner rotor comprising a first plurality of permanent magnets, a second rotor in the form of a plurality of ferromagnetic pole pieces, and a stator which is associated with a plurality of 3-phase windings and to the periphery of which a plurality of second permanent magnets are fixed. The magnetic pole piece rotor is connected to a drive shaft provided with a propulsion means for providing propulsion to the marine vessel. The first or inner rotor is free to rotate about the drive shaft. The pole pieces of the second rotor are arranged to magnetically couple the permanent magnets of the first or inner rotor to the second permanent magnets on the stator.

Abstract: A power supply system for a marine drilling vessel is provided. The power supply system comprises a first power grid section coupled to a generator configured to generate electric power and further coupled to an electrically powered active heave compensator. The heave compensator is configured to raise and lower a drill string relative to the marine drilling vessel. The power supply system further comprises a second power grid section coupled to a generator configured to generate electric power and further coupled to an electrically powered thruster drive of the marine drilling vessel. The first power grid section is electrically coupled to the second power grid section.

Abstract: A watercraft includes a stern flotation compartment. The hull is carved out underneath the gunwales to admit a vertical cylindrical sleeve extending through the flotation compartment from top to bottom, and sealed top and bottom. A studded vertical mounting tube carrying an electric motor fits within a slotted cylindrical steering tube; the latter is carried on rotatable bearings affixed to the vertical cylindrical sleeve. A steering assembly is affixed to the slotted cylindrical steering tube and a guide tube fits closely within the vertical mounting tube. An electrical power cable is connected to the electric motor and a retraction assembly is affixed to the electric motor.

Abstract: A marine vessel propulsion device includes a bracket that is attachable to a marine vessel, a duct that is rotatable around a steering axis with respect to the bracket, a propeller that is rotatable with respect to the duct around a propeller axis extending in a direction perpendicular or substantially perpendicular to the steering axis, and an electric motor that rotates the propeller. The propeller includes a plurality of blades and a cylindrical rim that surrounds the plurality of blades, and is surrounded by the duct. The electric motor rotates the rim with respect to the duct.

Abstract: A personal watercraft body comprises a recess configured to receive similarly shaped cassettes. A first cassette may be motorized to propel the body relative to a body of water. A second cassette may be non-motorized and may include a storage space therein for storing personal items. An insert may be disposed between the cassettes and the recess to orient and fit the cassettes within the body.

Abstract: A retractable shallow water anchor system that mounts onto the trolling motor on a boat. The anchor system does not stick up above the top of the trolling motor. When the motor is pulled up or put down, the anchor system travels with it. With the trolling motor down, the user removes the rope from the cleat on the anchor system and two fiberglass rods extend out (extend to 7-8 ft.) to anchor the boat in place. The unit is made of aluminum, stainless steel, and fiberglass.

Abstract: An improvement in telescoping electric trolling motors is disclosed. The trolling motor has a telescoping shaft that changes the depth of the electric motor, and therefore the prop of the trolling motor. A cable is used to raise and lower the electric motor and telescope the shaft. The same cable is used to pivot the trolling motor into a storage position on the deck of the boat.

Abstract: A lateral thruster for a vessel with a housing (1), at least one electric motor (2, 2?) fitted in the housing (1) and at least one transverse propeller (13) acting transversely with respect to a longitudinal axis (3) of the vessel (5) is additionally provided with at least one longitudinal propeller (21) acting in a direction of the longitudinal axis (3) of the vessel (5).

Abstract: An improvement in telescoping electric trolling motors is disclosed. The trolling motor has a telescoping shaft that changes the depth of the electric motor, and therefore the prop of the trolling motor. A cable is used to raise and lower the electric motor and telescope the shaft. The same cable is used to pivot the trolling motor into a storage position on the deck of the boat.

Abstract: A catamaran type vessel for use in a wastewater facility for servicing submerged air diffusers is disclosed. The vessel has spaced apart pontoon having an A-frame spanning between the upper decks of the pontoon and connecting the pontoons. A hook connected to a winch is secured to a cross header above the space between the pontoons. The hook is lowered into water and lifts an air header, to which the air diffusers are connected. An air diffuser is then pulled on the pontoons and serviced. The vessel is then propelled to a position to service other air diffusers in the pontoon.

Abstract: An inflatable watercraft comprises a motorized cassette and at least one inflatable chamber. The at least one inflatable chamber is foldable relative to the motorized cassette at least when the inflatable watercraft is in a deflated configuration. The motorized cassette includes a motor, an impeller, at least one battery, and a pump configured to inflate the at least one inflatable chamber. The pump can include a reversible pump configured to deflate the at least one inflatable chamber.

Abstract: A marine vessel propulsion device includes a bracket that is attachable to a marine vessel, a duct that is rotatable around a steering axis with respect to the bracket, a propeller that is rotatable with respect to the duct around a propeller axis extending in a direction perpendicular or substantially perpendicular to the steering axis, and an electric motor that rotates the propeller. The propeller includes a plurality of blades and a cylindrical rim that surrounds the plurality of blades, and is surrounded by the duct. The electric motor rotates the rim with respect to the duct.

Abstract: Hybrid propulsion system for a vessel including main engines connected to propulsion to propulsion means via transmission devices and connection devices for connection and disconnection, where the system includes one or more electrical machines arranged to the transmission device(s) via connection device for connection and disconnection of the from the transmission device, and one or more hybrid shaft generators, which is/are arranged between the electrical machine and one or more switchboards for the vessel.

Abstract: A marine vessel includes a hull, a jet pump disposed outside the hull, and an electric motor arranged to drive the jet pump. The jet pump includes a water inlet, a jet nozzle disposed posterior to the water inlet, and a flow path connecting the water inlet and the jet nozzle, and is arranged to jet water, taken in through the water inlet, through the jet nozzle. The electric motor is disposed between the hull and the jet pump.

Abstract: A kayak motor attachment device for fastening a motor to a kayak comprising an elongated frame, where the elongated frame includes a pair of slots; a pair of fishing pole supports inserted into a pair of receiving holes positioned at a back of the kayak, where the pair of fishing pole supports attach to the elongated frame with a plurality of bolts through the pair of slots; an attachment housing secured to an end of the elongated frame; a support shaft attached to the attachment housing, where the support shaft rotates within the attachment housing to guide a propeller at a bottom end of the support shaft; and a motor attached atop the support shaft to power the propeller.

Abstract: A water craft comprising: an elongated hull comprising a passageway having an inlet and an outlet; a pump jet disposed within said passageway intermediate said inlet and said outlet; said pump jet being configured to receive water entering said passageway through said inlet and pump said water out of said outlet, whereby to propel said hull through water; a plurality of nozzles disposed on the outer surface of said hull, aft of said inlet, wherein said plurality of nozzles are configured to release a friction-reducing fluid, whereby the friction-reducing fluid displaces water from the surface of said hull so as to diminish friction on the outer surface of said hull and facilitate high speeds.

Abstract: A watercraft includes a stern flotation compartment. The hull is carved out underneath the gunwales to admit a vertical cylindrical sleeve extending through the flotation compartment from top to bottom, and sealed top and bottom. A studded vertical mounting tube carrying an electric motor fits within a slotted cylindrical steering tube; the latter is carried on rotatable bearings affixed to the vertical cylindrical sleeve. A steering assembly is affixed to the slotted cylindrical steering tube and a guide tube fits closely within the vertical mounting tube. An electrical power cable is connected to the electric motor and a retraction assembly is affixed to the electric motor.

Abstract: Provided is an electric outboard motor that includes a drive motor, which is an AC motor, as a drive source. The electric outboard motor includes: an outboard motor main body that includes the drive motor and an inverter that converters a direct current to an alternating current to supply the alternating current to the drive motor; a control/power supply unit that is formed separately from the outboard motor main body and that can supply the direct current to the inverter; and a connection cable that electrically connects the outboard motor main body and the control/power supply unit. The inverter and the drive motor are stacked and arranged in an axial direction of a rotation output axis of the drive motor. Part of the inverter falls within an outline of the drive motor in a view in the axial direction of the rotation output axis of the drive motor.

Abstract: A remote controlled motorized buoy is provided for rescuing people in the water. The buoy may be controlled by a person with a remote control to navigate to the person in need. The buoy may have flotation mechanisms to keep the buoy right side up in rough water conditions and includes visual indicators to help the user keep track of the buoys location, such as a flag and beacon. When the buoy is near the swimmer, the swimmer may grab the buoy and the buoy may be remotely navigated to bring the swimmer to a safe location.

Abstract: A system for mounting a motorized cassette to a watercraft body comprises a mounting assembly configured to releasably secure the system to the watercraft body, a housing, a tiller, and a motorized cassette. The housing includes a receiving space and the motorized cassette is configured to be at least partially inserted into the receiving space. Manipulation of the tiller causes rotation of the housing relative to the mounting assembly such that the tiller can be used to steer the watercraft body.

Abstract: A thrust generating apparatus which is positioned under water and configured to generate a thrust by ejecting water includes a duct-shaped stator provided with a plurality of armature coils, and a plurality of ring-shaped rotors which are arranged radially inward of the stator and provided with permanent magnets respectively corresponding to the plurality of armature coils, wherein the plurality of rotors are arranged in series in a rotational axis direction thereof and each of the rotors has a propeller vane protruding radially inward. A thrust generating apparatus is capable of outputting a high driving power without increasing a propeller diameter.

Abstract: A vessel includes a first propulsion mechanism, at least one second propulsion mechanism, and a hull. The first propulsion mechanism is arranged to generate thrust by an internal combustion engine. The second propulsion mechanism is arranged to generate thrust by an electric motor. The first propulsion mechanism and the second propulsion mechanism are disposed in the hull. The first propulsion mechanism and the second propulsion mechanism are mutually independent. A direction of the thrust generated by the first propulsion mechanism and a direction of the thrust generated by the at least one second propulsion mechanism are the same as each other.

Abstract: A gondola drive for a floating device has an underwater housing circulated around by water. The gondola drive contains a drive module which has a drive module housing and a shaft disposed therein, a transmission module with a transmission module housing and a transmission disposed therein and a propeller. The drive module and the transmission module are each configured as separate components connected to one another such that the drive module housing and the transmission module housing form at least a part of the underwater housing and that the shaft is coupled to the transmission for driving the propeller.

Abstract: A rechargeable battery includes a plurality of electrode assemblies including a first electrode assembly and a second electrode assembly; a case housing the plurality of electrode assemblies; a first conductive plate between the first electrode assembly and the case; and a first contact electrically coupling the first conductive plate to the second electrode assembly.

Abstract: A marine vessel propulsion device includes a propeller rotatable around a propeller axis, a duct that surrounds the propeller around the propeller axis, an internal combustion engine that rotates the propeller relative the duct, and an electric motor that rotates the propeller relative to the duct. The propeller includes a plurality of blades, and a cylindrical rim that surrounds the plurality of blades around the propeller axis. The electric motor rotates the propeller by rotating the rim.