An underwater motive device includes a rear main housing including two opposite handle bar elements on two sides respectively, and longitudinal rear joining projections on an inner surface; a power mechanism in the rear main housing; a propeller driven by a driving shaft of the power mechanism; a bridging housing including a battery compartment, a forward joining member, a shoulder abutted the forward joining member, and a rear joining member; a hollow intermediate housing including two opposite handle bar members on two sides respectively, the handle bar members joined the handle bar elements, longitudinal front joining projections on an inner surface, and an internal annular limit element at a front end; and a front cone including a rear opening and a structure on an inner surface for securing to the forward joining member of the bridging housing.

The invention relates to a water board (2) made of a material that can float on water, having a support area (8), on which a user rests at least partially. To reduce the current forces acting on the user while holding on to and being towed behind a motorized watercraft (24), it is proposed that the water board (2) has, at a front-end area, an attachment segment (22) for the articulation of the water board (2) to the watercraft (24).

The invention relates to a propulsion device comprising a platform that is arranged so as to accommodate a passenger and cooperates with a thrust unit comprising a main nozzle, advantageously oriented from the bow to the stern of the device, and two secondary nozzles that are lateral and are positioned essentially at the bow of the propulsion device. The secondary nozzles are mounted so as to be mobile about a transverse axis so as to be moved by actuators controlled by a processing unit that implements a method for controlling the secondary nozzles, thus providing automatic control assistance to the passenger.

The invention relates to a propulsion device comprising a platform that is arranged so as to accommodate a passenger and cooperates with a thrust unit comprising a main nozzle, advantageously oriented from the bow to the stern of the device, and two secondary nozzles that are lateral and are positioned essentially at the bow of the propulsion device. The secondary nozzles are mounted so as to be mobile about a transverse axis so as to be moved by actuators controlled by a processing unit that implements a method for controlling the secondary nozzles, thus providing automatic control assistance to the passenger.

A personal propulsion device for use with a floatation device includes a pair of propulsion units. Each propulsion unit comprises a power module, a motor, and a propeller. The motor is operationally coupled to the power module and the propeller so that the motor is positioned to selectively rotate the propeller to impart a force on water. Each propulsion unit is configured to be grasped in a respective hand of a user who is positioned on a floatation device. The user is positioned to submerge the propulsion unit in a body of water so that the floatation device is motivated across a surface of the body of water.

A personal propulsion device for use with a floatation device includes a pair of propulsion units. Each propulsion unit comprises a power module, a motor, and a propeller. The motor is operationally coupled to the power module and the propeller so that the motor is positioned to selectively rotate the propeller to impart a force on water. Each propulsion unit is configured to be grasped in a respective hand of a user who is positioned on a floatation device. The user is positioned to submerge the propulsion unit in a body of water so that the floatation device is motivated across a surface of the body of water.

A personal propulsion device for use with a floatation device includes a pair of propulsion units. Each propulsion unit comprises a power module, a motor, and a propeller. The motor is operationally coupled to the power module and the propeller so that the motor is positioned to selectively rotate the propeller to impart a force on water. Each propulsion unit is configured to be grasped in a respective hand of a user who is positioned on a floatation device. The user is positioned to submerge the propulsion unit in a body of water so that the floatation device is motivated across a surface of the body of water.

A personal propulsion device for use with a floatation device includes a pair of propulsion units. Each propulsion unit comprises a power module, a motor, and a propeller. The motor is operationally coupled to the power module and the propeller so that the motor is positioned to selectively rotate the propeller to impart a force on water. Each propulsion unit is configured to be grasped in a respective hand of a user who is positioned on a floatation device. The user is positioned to submerge the propulsion unit in a body of water so that the floatation device is motivated across a surface of the body of water.

A propulsion device, including a platform; a thrust assembly coupled to the platform, the thrust assembly including at least two nozzles configured to discharge a pressurized fluid therefrom that are movable with respect to the platform; a plurality of actuators, wherein each actuator is coupled to one of the at least two nozzles, wherein each actuator is configured to adjust an angular orientation of its respective nozzle with respect to the platform; a first sensor coupled to the platform to measure at least one of a pitch and roll of the platform; and a controller in communication with the first sensor and the plurality of actuators, wherein the controller is configured to adjust an operation of the actuators based at least in part on information from the first sensor to modify an angular orientation of the at least two nozzles.

A propulsion device, including a platform; a thrust assembly coupled to the platform, the thrust assembly including at least two nozzles configured to discharge a pressurized fluid therefrom that are movable with respect to the platform; a plurality of actuators, wherein each actuator is coupled to one of the at least two nozzles, wherein each actuator is configured to adjust an angular orientation of its respective nozzle with respect to the platform; a first sensor coupled to the platform to measure at least one of a pitch and roll of the platform; and a controller in communication with the first sensor and the plurality of actuators, wherein the controller is configured to adjust an operation of the actuators based at least in part on information from the first sensor to modify an angular orientation of the at least two nozzles.