A method of navigating an UAV over water with vertical takeoff and landing (VTOL) function. The UAV having a plurality of lift propellers; a cabin engaged with a plurality of lift propellers; a water propulsion system engaged with the cabin to push the cabin in a forward direction when the cabin is at least partially immersed in water; at least one water inlet engaged with the water propulsion system; the cabin is a cargo hold or a passenger cabin. The UAV provided by the disclosure can realize vertical takeoff and landing in the water area, and fly, drive and navigate freely in the whole area.

An air pump is delineated for an inflatable product that can be selectively connected thereto. The inflatable product includes a shell located on a side wall. The shell includes an internal chamber for selective placement of the air pump and an air valve for selective communication with the air pump. When the air pump is located in the internal chamber it can be moved to switch between a first position and a second position. The air pump includes an air inlet and an air outlet such that the air inlet is in communication with the air valve in the first position to deflate the inflatable product and the air outlet is in communication with the air valve in the second position to inflate the inflatable product. The air pump can also be used externally via manual connection between the air inlet or the air outlet and other inflatable products.

A device comprises a spring and a sleeve. The spring is configured to form a closed loop. The spring is moveable between a coiled configuration when the spring is collapsed and an uncoiled configuration when the spring is expanded. The spring defines a circumference while in the uncoiled configuration. The spring is disposed within the sleeve.

A device comprises a spring and a sleeve. The spring is configured to form a closed loop. The spring is moveable between a coiled configuration when the spring is collapsed and an uncoiled configuration when the spring is expanded. The spring defines a circumference while in the uncoiled configuration. The spring is disposed within the sleeve.

A convertible inflatable device includes a first inflatable bed, a second inflatable bed, a front chamber, a left chamber, a right chamber, and a rear chamber. The first inflatable bed is surrounded by the front chamber, the left chamber, the right chamber, and the rear chamber. The front chamber, the left chamber, the rear chamber, and the right chamber are connected to each other sequentially. A first end of the second inflatable bed is connected to the junction of the first inflatable bed and the rear chamber. The convertible inflatable device can be converted to an inflatable bed, an inflatable boat, an inflatable water slide or an inflatable recliner chair, and the conversion between any of them is mutual and convenient.

The present invention is directed to an inflatable and floatable modular platform system wherein certain embodiments comprise an adjustable back-rest. The inflatable platform system of the present disclosure includes floating elements of differing shapes and sizes configured to be interconnected in order to allow users to stand, sit, and walk between floating elements. Embodiments include inflatable platforms having circular, arc-shaped, rectangular, and L-shaped inflatable platforms.

The invention relates to a small-sized shipbuilding. In particular, to a stern plug to be inserted into a stern portion of an inflatable bottom of a water jet boat, the plug is made such that it follows a shape of a front portion of the bottom of the boat, based on a hollow volume that is open at one base and comprises a closed second base and a lateral surface, the lateral surface is arranged along an outer contour of the closed base, and the closed base is made such that it follows a shape of the front portion of the bottom, and the lateral surface is made in a form of shelves, where an upper shelf is made straight, wherein the plug is made in a form of a monolithic cast piece of an elastic shape-retaining material, where the open base has a mesh cellular structure, where a lower shelf of the bottom is made straight, and plate-shaped guides for fixing to the boat are mounted on the shelves.

An air pump is delineated for an inflatable product that can be selectively connected thereto. The inflatable product includes a shell located on a side wall. The shell includes an internal chamber for selective placement of the air pump and an air valve for selective communication with the air pump. When the air pump is located in the internal chamber it can be moved to switch between a first position and a second position. The air pump includes an air inlet and an air outlet such that the air inlet is in communication with the air valve in the first position to deflate the inflatable product and the air outlet is in communication with the air valve in the second position to inflate the inflatable product. The air pump can also be used externally via manual connection between the air inlet or the air outlet and other inflatable products.

Disclosed herein is an inflatable watercraft barrier in one example having an inflatable perimeter tube. Also disclosed is a diaphragm sealed to the perimeter tube to form the watercraft barrier between a watercraft and the water in which the watercraft barrier and watercraft float. In one example, a portion of the perimeter tube forms a gate portion which is at least partially selectively deflated so as to be denser than water, and therefore rotates about a gate pivot such that the watercraft may enter the watercraft barrier through the gate portion. Also disclosed is a water pump in fluid communication with the watercraft barrier so as to evacuate water from between the watercraft barrier and the watercraft.

An inflatable stand up paddleboard, combined with a thermally insulated compartment is disclosed herein. The compartment may be used for storage of food, drink, personal effects, and other items that may require storage in a temperature stabilized medium. As constructed, the compartment and storage of items therein does not diminish the functionality or versatility of the inflatable paddleboard.