The present invention relates to a human-powered boat that a user can easily operate with his/her own manual power even though the boat is in a form causing large resistance to propulsion, and the human-powered boat is equipped with a propulsion apparatus that imitates the tail fin of a fish. The propulsion apparatus, in which an oscillating foil mechanism is applied to an L-shaped oar, enables a rider to perform forward-facing rowing and can easily change a direction and prevent damage due to a collision with an underwater obstacle. Typically, the human-powered boat of the present invention has the following three limitations in order to maximize simplicity while maintaining propulsion efficiency, compared with prior arts in the same technical field: First, a rider has a specific limitation in tilting the propulsion apparatus through an up-down movement of his/her arm. Second, the foil of the propulsion apparatus does not make contact with the longitudinal axis of the boat body in a predetermined range of motion. Third, the propulsion apparatus has a predetermined level of limitation in generating a propulsion force below the submerged portion of the boat body.

An infant recreational floatation device is provided. In some embodiments, a floatation device for an infant is provided, the floatation device comprising an inflatable ring having a top surface and a bottom surface, wherein the inflatable ring includes: an air chamber having an upper chamber portion and a lower chamber portion that are divided by a layer; a cut through the air chamber of the inflatable ring that forms a first end of the inflatable ring and a second end of the inflatable ring, wherein the first end and the second end of the inflatable ring are displaced to insert a neck of the infant into an interior space; a plurality of cut-out portions adjacent to the interior space; and a plurality of fasteners placed on the top surface and the bottom surface of the inflatable ring that detachably connect the first end and the second end of the inflatable ring.

The present invention provides an inflatable device that floats on water having an inflatable body for flotation; and a built-in speaker unit being secured in a first compartment in the body. In addition, the first compartment and the speaker may be in the headrest, or armrest, or in a removable pillow. Further, the battery box is secured in a second compartment in the body, wherein the battery is rechargeable and the speaker unit is connected to the battery as a power source, or to a solar power source. The present invention also provides a flotation device that floats on water having a foam body for flotation; and a built-in speaker unit being secured in a first compartment in the body. In addition, the first compartment and the speaker may be in the headrest, or armrest, or in a removable pillow. Further, the battery box is secured in a second compartment in the body, wherein the battery is rechargeable and the speaker unit is connected to the battery as a power source, or to a solar power source.

A water walking apparatus having two inflatable pontoons, each with respective holes in their top surfaces for a footwell. A platform support may expand and contract when in use so as to accommodate variable spacing between the pontoons. The platform support may include curved saddle, which straddles over the curved outer surface of a pontoon, securing the platform support to the pontoons. A platform upon which a user may sit may be connected to the platform support by a neck received into a hole in the bottom of the platform. The platform may include a backrest member, and a strap that may serve as a ladder step when the backrest member is rotated rearwardly and down, into the water to allow a user to step on the continuous strap and climb up onto the platform.

An inflatable recliner includes an inflatable body and a side portion disposed beside the inflatable body. The inflatable body includes a backrest portion, and a buttock-and-leg support portion connected to the backrest portion. The side portion is extended backward and beyond where the backrest portion and the buttock-and-leg support portion are connected, thereby providing the inflatable body with a supporting force that prevents the inflatable recliner from being overturned.

An air couch bed includes a first inflatable body. The first inflatable body includes a first wall, a second wall disposed opposite to the first wall, and a third wall connecting the first wall and the second wall. The second wall defines a concave space, by virtue of which the first inflatable body is bendable. The concave space is extended to the third wall. The first inflatable body is an air bed when the first inflatable body is flattened, and is an air couch when the first inflatable body is bent.

An inflatable product and a method of manufacturing the inflatable product are provided. The inflatable product includes an inflatable pad body and an inflatable backrest body. The inflatable pad body includes a top wall, a bottom wall disposed opposite to the top wall, and a side wall connecting the top wall and the bottom wall. The inflatable backrest body includes a front wall and a back wall connected to the front wall. The front wall adjoins the top wall. The back wall adjoins the side wall.

An inflatable product includes an inflatable body and a supplemental sheet. The supplemental sheet is connected to the inflatable body to form a space. When the inflatable body is inflated, the inflatable body is expanded due to increased air pressure therein and the space becomes reduced in size. Accordingly, when a portion of a sheet or a cover is put in the space and the inflatable body is inflated to reduce the space in size, the portion of the sheet or the cover is held by the supplemental sheet and the inflatable body.

A floating device and a method of keeping a floating device in position in water are provided. The floating device includes a main body and a projecting portion. The main body is configured to float on water. The projecting portion extends from the main body into the water to surround a part of water for keeping the main body in position.

A water walking apparatus having two inflatable pontoons, each with respective holes in their top surfaces for a footwell. A platform support may expand and contract when in use so as to accommodate variable spacing between the pontoons. The platform support may include curved saddle, which straddles over the curved outer surface of a pontoon, securing the platform support to the pontoons. A platform upon which a user may sit may be connected to the platform support by a neck received into a hole in the bottom of the platform. The platform may include a backrest member, and a strap that may serve as a ladder step when the backrest member is rotated rearwardly and down, into the water to allow a user to step on the continuous strap and climb up onto the platform.