A watersports paddle includes an elongated handle body having a first material, a biased member having a second material more flexible than the first material such that the biased member is more flexible than the elongated handle body, and a paddle blade coupled to the biased member opposite the elongated handle body. The biased member deforms when a force is applied to the biased member with the elongated handle body by pulling the paddle blade through water and reforms when the force is not applied to the biased member by the elongated handle body to store and release energy during use of the watersports paddle. The biased member may be a substantially planar leaf spring or a bowed leaf spring.

A wind paddle sail assembly includes a sail having stiffened upper and lower ends and a paddle or pole having an upper fixed end and a lower portion with a lower free end. A fastener fastens the upper fixed end of the paddle or pole to the upper end of the sail. A downhaul strap fastens the lower end of the sail to the lower portion of the paddle or pole for adjusting tension in the sail. A method for operating a wind paddle sail assembly is also provided.

The invention is directed to a graspable human propulsion device which contains a ducted fan assembly on the aft portion of a longitudinal structure which the user grasps onto, which acts to propel the user along the longitudinal direction of the device while the user is mounted on a human transportation apparatus, such as a skateboard. The user can orient the device so that the ducted fan assembly leads ahead or trails behind the user, according to user preference. In one embodiment, the user controls the direction and amount of thrust by use of a spring twist throttle mechanism. In another embodiment, the user controls the direction and amount of thrust by use of a trigger and switch mechanism. The fore latch and the aft latch allow the user to clamp the device onto a skateboard deck for ease in transporting while on foot.

A device for support and propulsion comprising a shaft, a spring element coupled to the shaft, and a swing arm coupled to the shaft and the spring element. A lower portion of the spring element comprises a ground interface, optionally comprising a wheel.

Provided is an accessory for a self-balancing board having two lateral foot-deck ends, each being coupled to a motor that drives a wheel in response to its orientation. The foot-deck has at least one sensor that is triggered when a rider is in a riding position thereon. The accessory includes a chassis, at least one travel surface-contacting element, a seat, and an engagement structure that releasably engages the self-balancing board. At least one sensor-triggering element is actuatable between an idle position and a triggering position, wherein the at least one sensor-triggering element triggers the at least one sensor. At least one control member actuates at least one of the engagement structure and the at least one sensor-triggering element to control the orientation of the lateral foot-deck ends. At least one manually actuatable actuator actuates the at least one sensor-triggering element between the idle position and the triggering position.

A device for support and propulsion comprising a shaft, a spring element coupled to the shaft, and a swing arm coupled to the shaft and the spring element. A lower portion of the spring element comprises a ground interface, optionally comprising a wheel.

In an aspect, a powered vehicle is provided, and includes a body to support a rider. At least one wheel is rotatably coupled to the body to enable travel of the body over a travel surface. At least one motor is coupled to at least one of the at least one wheel to drive rotation thereof. A power source is coupled to the at least one motor to power the at least one motor. A remote sensor unit is wearable by the rider and configured to detect at least one of an orientation, a position, and movement of the rider and transmit sensor data generated therefrom. A motor control unit is coupled to the at least one motor and is configured to receive the sensor data and control the operation of the at least one motor based at least in part on the sensor data.

The present invention provides a portable gyroscopic device for the transportation of objects or individuals which comprises: a portable receptacle (A) which comprises: a frame (1) on which an axis (3) of a gyroscopic element comprising one or more masses or flywheel units (2) is mounted; at least one electric motor (8) which actuates at least one mass or flywheel unit of said gyroscopic element mentioned, a source of electric power (5); and electronic control means (6) to operate: said electric motor.

Besides, the invention provides a set of portable gyroscopic device and accessories for the transportation of objects or individuals which comprises the portable gyroscopic device according to claims 1 to 1 and a transportation platform (11) which comprises elements for the transportation of said platform which are selected between mechanical bearings, drones, an air cushion and an electromagnetic field.

In an embodiment, a ducted fan propulsion system comprises an outer cowling, adapted to form a duct. The duct houses one or more fan blades rotating about a central axis. One or more motors are in communication with the fan blades and in communication with a power source. The duct is transversed by a plurality of spokes. In an embodiment, multiple ducts are housed within an outer cowling, with each duct comprising one or more rotatable fan blades, one or more central axes, and one or more motors. In each embodiment, one or more members are attached to the ducted or multi-ducted fan propulsion system and extend to a user or vehicle. The members terminate in a handle further comprising a throttle adjuster.

An accessory mounting system to mount accessories onto recreational vehicles. The accessory mounting system can include an accessory mounting frame with an elongated seat, left and right attachment wings extending perpendicularly away from a first side of the seat and an accessory post extending in parallel between the left and right attachment wings to receive an accessory rack thereon. The accessory mounting system can also include an accessory rack with a sleeve to receive the accessory post therethrough and a flexible accessory clip to clip onto the accessory post when the accessory post is inserted through the sleeve, the accessory rack can also include at least two fastening devices to fasten an accessory bag thereto.