A handheld, detachable implement for propelling a paddleboard which affixed to a distal end of an oar, the implement comprising a propeller, motor and power supply. The oar and propulsion implement may be formed as a single integrated piece or held together using a friction fit. A plurality of sensor and indicator integrate into the implement.

A handheld, detachable implement for propelling a paddleboard which affixed to a distal end of an oar, the implement comprising a propeller, motor and power supply. The oar and propulsion implement may be formed as a single integrated piece or held together using a friction fit. A plurality of sensor and indicator integrate into the implement.

Devices, such as aerodynamic kites used in kiteboarding (also known as kitesurfing), handheld aerodynamic wings used in wing foiling and wing surfing, and paddles used in paddleboarding, for generating a force for powering a user on an appropriately configured vehicle, such as a kiteboard, kitesurfing foilboard, hydrofoil board, surfboard, wing board, wing foil board, stand up paddleboard, stand up paddleboard with hydrofoil, roller skates, rollerblades, skateboards, snowboards, skis, or ice skates, to traverse across a body of water, sand, earth, paved area, snow, or ice, are provided with a thrust generating device (e.g., an electric ducted fan system) to assist in generating said force.

Devices, such as aerodynamic kites used in kiteboarding (also known as kitesurfing), handheld aerodynamic wings used in wing foiling and wing surfing, and paddles used in paddleboarding, for generating a force for powering a user on an appropriately configured vehicle, such as a kiteboard, kitesurfing foilboard, hydrofoil board, surfboard, wing board, wing foil board, stand up paddleboard, stand up paddleboard with hydrofoil, roller skates, rollerblades, skateboards, snowboards, skis, or ice skates, to traverse across a body of water, sand, earth, paved area, snow, or ice, are provided with a thrust generating device (e.g., an electric ducted fan system) to assist in generating said force.

A watercraft paddle assembly for enhancing comfort while paddling a watercraft includes a paddle that has a handle portion is elongated and a paddle portion. A roller attachment is coupled to the handle portion and the roller attachment is distally positioned with respect to paddle portion of the paddle. The roller attachment has an attached section that is oriented at an angle with a roller section. A roller is rotatably integrated into the roller section of the roller attachment such that the roller can be gripped by the user. The roller is oriented to rotate about an axis that is oriented perpendicular to a lengthwise axis of the paddle to facilitate the user to grip the roller and the handle portion of the paddle in a preferred manner for paddling.

A watercraft paddle assembly for enhancing comfort while paddling a watercraft includes a paddle that has a handle portion is elongated and a paddle portion. A roller attachment is coupled to the handle portion and the roller attachment is distally positioned with respect to paddle portion of the paddle. The roller attachment has an attached section that is oriented at an angle with a roller section. A roller is rotatably integrated into the roller section of the roller attachment such that the roller can be gripped by the user. The roller is oriented to rotate about an axis that is oriented perpendicular to a lengthwise axis of the paddle to facilitate the user to grip the roller and the handle portion of the paddle in a preferred manner for paddling.

A multi-function oar has an oar blade, a large-diameter tube, and a small-diameter tube. The oar blade has a tube-connecting portion. The tube-connecting portion has a through axial hole. The large-diameter tube is movably inserted in the axial hole. The axial hole has an upper positioning portion and a lower positioning portion for positioning the large-diameter tube, thereby changing the overall length of the oar. The large-diameter tube has a first check valve. The first check valve has a bail opening. The small-diameter tube is provided with a second check valve and an operating member having a water outlet, so as to bail water and drain water.

A multi-function oar has an oar blade, a large-diameter tube, and a small-diameter tube. The oar blade has a tube-connecting portion. The tube-connecting portion has a through axial hole. The large-diameter tube is movably inserted in the axial hole. The axial hole has an upper positioning portion and a lower positioning portion for positioning the large-diameter tube, thereby changing the overall length of the oar. The large-diameter tube has a first check valve. The first check valve has a bail opening. The small-diameter tube is provided with a second check valve and an operating member having a water outlet, so as to bail water and drain water.

A vehicle using an action-reaction principle is proposed. More particularly, there is proposed a vehicle using an action-reaction principle, the vehicle being able to be moved forward by reaction that is generated when a propelling member repeatedly slides.

A vehicle using an action-reaction principle is proposed. More particularly, there is proposed a vehicle using an action-reaction principle, the vehicle being able to be moved forward by reaction that is generated when a propelling member repeatedly slides.