Abstract: An inflatable boat includes a hull-bottom backing sheet member, a hull-bottom top sheet member, transom strips bonded between the hull-bottom backing sheet member and the hull-bottom top sheet member, left and right sheet members bonded to the hull-bottom backing sheet member outside the hull-bottom top sheet member to form two lateral air chambers and to have the bonding areas between the hull-bottom backing sheet member and the left and right sheet members be kept above the waterline, and a V-shaped front piece formed on the middle of the front side of the hull bottom of the inflatable boat for breaking water (waves).

Abstract: An inflatable rubber boat includes a flat bottom fabric member formed of a fabric having a front V-cut and two lateral sides, the two border edges of the front V-cut being seamed together to form a forwardly upwardly curved front end edge of the flat bottom fabric member, an elongated main inflatable airbag member fastened to the forwardly upwardly curved front end edge and two lateral sides of the flat bottom fabric member, a floorboard member having a body fitting over the flat bottom fabric member and a pointed arch-shaped rib obliquely upwardly extended from the front side of the body and fastened to the contained angle defined between the upwardly curved front end edge of the flat bottom fabric member and the elongated main inflatable airbag member, and a supplementary inflatable airbag member longitudinally set between the floorboard member and the flat bottom fabric member and inflated to stretch the flat bottom fabric member into shape.

Abstract: An inflatable rubber boat includes a flat bottom fabric member formed of a fabric having a front V-cut and two lateral sides, the two border edges of the front V-cut being seamed together to form a forwardly upwardly curved front end edge of the flat bottom fabric member, an elongated main inflatable airbag member fastened to the forwardly upwardly curved front end edge and two lateral sides of the flat bottom fabric member, a floorboard member having a body fitting over the flat bottom fabric member and a pointed arch-shaped rib obliquely upwardly extended from the front side of the body and fastened to the contained angle defined between the upwardly curved front end edge of the flat bottom fabric member and the elongated main inflatable airbag member, and a supplementary inflatable airbag member longitudinally set between the floorboard member and the flat bottom fabric member and inflated to stretch the flat bottom fabric member into shape.

Abstract: A multipurpose and inflatable raft mainly composed of an inflatable circular raft unit, an inflatable shperical raft unit and an inflatable back seat, wherein said circular raft unit comprising several retainer plates for the connection with the retaining rings of the spherical raft unit so as to form a raft of high buoyance, and by means of fixtures attached to the circular raft unit for the fixation of pedalling device to form a pedalling raft, and by means of locating plates arranged bilaterally to the circular raft unit for the fixation of either oar for use in water or braking rod for use in snow-skiing as a braking device.

Abstract: A knockdown type inflatable sailboat which has a carrier system composed of two inflatable rafts assembled with a plurality of U-like fastening elements of a hull assembly and which uses a power system located on the bow with a main mast to support a sail which is further fastened by means of a rod and two riggings, and a steering system composed of rudders and water breakers.