The present invention relates to a novel water sports device that allows a user to perform water skiing and other activities while sitting on the device. The device includes a toboggan style structure positioned atop a pair of water skis. The pair of skis are secured to the underside of the toboggan using a plurality of panels or supports so that the skis partially overlap and extend beyond the edges of the toboggan. Each of the pair of skis comprise a binding which is sized and configured to accommodate a foot of the user while sitting on the toboggan. The device provides enhanced balance, buoyancy, and floating capability, and also comprises a backrest for supporting the back of the user while enjoying the device on the water.

The present invention relates to a novel water sports device that allows a user to perform water skiing and other activities while sitting on the device. The device includes a toboggan style structure positioned atop a pair of water skis. The pair of skis are secured to the underside of the toboggan using a plurality of panels or supports so that the skis partially overlap and extend beyond the edges of the toboggan. Each of the pair of skis comprise a binding which is sized and configured to accommodate a foot of the user while sitting on the toboggan. The device provides enhanced balance, buoyancy, and floating capability, and also comprises a backrest for supporting the back of the user while enjoying the device on the water.

Diver propulsion devices and methods of propelling the devices and divers upon and beneath the sea are presented. A diver propulsion device is comprised of a wing buoyant in water, an electric motor propulsion system, a leash interconnecting the wing and diver, which leash may integrate control circuitry of the motor, photovoltaics atop the wing, and, batteries, each electrically connecting the motors, fins attaching the wing provide hydrofoil flight stabilization, and foot constraints attaching a deck of the wing. The wing is a hydrofoil, and the diver stands and lies upon the deck of the wing, and, during hydrofoil flight, the diver is substantially above the sea and the wing is seaborne. In hydrofoil flight, the device may be motor propelled, or, by the diver heaving and pitching the device, or, by both methods simultaneously. Undersea, the device tows the diver by motor power energized photovoltaically, and, or, by battery.

Diver propulsion devices and methods of propelling the devices and divers upon and beneath the sea are presented. A diver propulsion device is comprised of a wing buoyant in water, an electric motor propulsion system, a leash interconnecting the wing and diver, which leash may integrate control circuitry of the motor, photovoltaics atop the wing, and, batteries, each electrically connecting the motors, fins attaching the wing provide hydrofoil flight stabilization, and foot constraints attaching a deck of the wing. The wing is a hydrofoil, and the diver stands and lies upon the deck of the wing, and, during hydrofoil flight, the diver is substantially above the sea and the wing is seaborne. In hydrofoil flight, the device may be motor propelled, or, by the diver heaving and pitching the device, or, by both methods simultaneously. Undersea, the device tows the diver by motor power energized photovoltaically, and, or, by battery.

The invention relates to a hydrofoil for small vessels (1), comprising a front foil set (3) formed by a wing (32), with marked negative dihedral, which is attached to the vessel (1) by means of two struts (31), of circular or quasi-circular section, and a rear foil set (2) formed by a wing (22) that is flat or with minimal dihedral, attached to the vessel (1) by means of two struts (21); the front (3) and rear (2) foil sets being positioned longitudinally forward and aft, respectively, of the overall centre of gravity of the vessel, including also the pilot and/or crew.

A stabilized a hydrofoil water craft comprising: a water-craft base member, a hydrofoil mast having proximal and distal portions; said proximal portion mechanically connected to said bottom side of said water-craft base member, a fuselage mechanically connected to said distal portion of said at least one hydrofoil mast, a rudder configured for controlling a yaw angle of said water craft, an elevator rotatable around an axis lying in a plane parallel to water-craft base member and a stabilization arrangement further comprising at least one sensor configured for detecting a 3D orientation of said water-craft base member, an estimator configured for estimating the 3D orientation, actuators for manipulating the rudder and elevator and a controller for analyzing the estimated 3D orientation and controlling the actuators. In response to a disturb roll inclination of the water craft, the controller generates a command to a rudder actuator to compensate the detected inclination.

A stabilized a hydrofoil water craft comprising: a water-craft base member, a hydrofoil mast having proximal and distal portions; said proximal portion mechanically connected to said bottom side of said water-craft base member, a fuselage mechanically connected to said distal portion of said at least one hydrofoil mast, a rudder configured for controlling a yaw angle of said water craft, an elevator rotatable around an axis lying in a plane parallel to water-craft base member and a stabilization arrangement further comprising at least one sensor configured for detecting a 3D orientation of said water-craft base member, an estimator configured for estimating the 3D orientation, actuators for manipulating the rudder and elevator and a controller for analyzing the estimated 3D orientation and controlling the actuators. In response to a disturb roll inclination of the water craft, the controller generates a command to a rudder actuator to compensate the detected inclination.

An electric hydrofoil board having a submersion-cooled powertrain is provided. A powertrain assembly, which includes a motor housed in a motor assembly and an electronic speed controller housed in a nose cone assembly that is fastened to the motor assembly, is attached to a lower end of a mast of the hydrofoil board so that the powertrain assembly remains submerged at all times during normal use of the hydrofoil board in a body of water. The flow of water around the powertrain assembly during normal use cools heat-generating components of the electronic speed controller and motor.

An electric hydrofoil board having a submersion-cooled powertrain is provided. A powertrain assembly, which includes a motor housed in a motor assembly and an electronic speed controller housed in a nose cone assembly that is fastened to the motor assembly, is attached to a lower end of a mast of the hydrofoil board so that the powertrain assembly remains submerged at all times during normal use of the hydrofoil board in a body of water. The flow of water around the powertrain assembly during normal use cools heat-generating components of the electronic speed controller and motor.

A mount for removably installing a fin to a board used in water sports such as a surf board, wake board, windsurfing board and stand-up paddle board is provided. The mount is secured within the deck of the board and has a pivoting member pivoting between a locked position, to lock a fin to the board, to an unlocked position where the fin can be removed from the board, under hand pressure. As shown in drawing the pivoting member pivots about a pivot pin. In the unlocked position lug can be disengaged from its complementary recess (such as a notch) in the front end of the base of fin and the fin can be removed from the mount. In the locked operation the fin is fitted into channel and the pivoting member pivoted by hand pressure on a plate to cause lug to engage with notch.