Abstract: A pontoon includes an elongated body of non-uniform diameter. The body is dimensioned and configured to provide a non-uniform buoyant force to a boat along at least a majority of a length of a boat. Also provided is a pontoon boat including pontoons as described above. The pontoon boat also includes a deck having an upper surface and a lower surface. The pontoons are attached to the lower surface of the deck.

Abstract: An inflatable structure comprises an inflatable tubular member that is constructed of an elongate, flexible strip of woven fabric that is impervious to air and water. The elongate strip has a first elongate edge and a second elongate edge and is spiraled into a tubular shape such that the first elongate edge is adjacent the second elongate edge to thereby form a spiral seam. A first elongate tape member is thermobonded to an inner surface of the tubular member along the length of the spiral seam for sealing the spiral seam from inside. A second elongate tape member is thermobonded to the outer surface of the tubular member along the length of the spiral seam for reinforcing the spiral seam.

Abstract: Fractal hollow tube reinforced structural members are presented having a maximum strength-to-weight ratio and a wall density less than 1/2 that of water, which are versatile, practical and economical for use in any kind of construction. The strength is maximized by introducing a high degree of order down to the atomic scale to the walls of the hollow structures, while the mass and thickness of these walls is minimized. The wall density is further reduced by including microspheres in the walls, mesh spaces and bonding substances which minimizes the total mass of bonding agent that uselessly occupies the dead spaces of the meshes and coils of the fibers and tubes. Strength and thermal tolerance are further enhanced by building the tube walls out of hollow carbon or titanium fibers and buckyball microspheres. These fractal structural members will greatly improve the fuel efficiency of any craft supported by them and will make possible crafts and structures never possible before.

Abstract: A collapsible fishing raft comprising pontoons, a means of connecting the said pontoons and a seat, which components are capable of being transported by one person by backpack or pack frame over high mountain foot trails.

Abstract: A modular marine flotation collar for aquaculture applications is disclosed. Component collar segments are sealed by bulkheads including a connecting flange. Standard component collar segments may be assembled into a desired configuration by flange-to-flange connection of adjacent collar segments. A plurality of elongate tubular members having arcuate recesses conforming to the outer perimeters of supporting collar segments are arranged transversely atop the collar assembly so as to provide for the construction of an elevated walkway.

Abstract: The cylindrical shape tube consists of a pressure valve and a safety valve. Whether the tube's contents be made of metal, expandable or non-stretchable materials, it has the ability to retain low air pressure. For safety purposes, any excess air pressure is released through the safety valve when the belts are made of metal content, the lengthwise belts have flares and grooves, the crosswise belts have oblong holes. When the belts are made of expandable or non-stretchable materials, snap head and grooves are cast within the lengthwise belts, the crosswise belts have round holes. The metal crosswise belts with their oblong holes can be engaged onto both the snap heads of the expandable lengthwise belts and flares of metal lengthwise belts. The expandable crosswise belts with their round holes can be snapped onto the snap heads of the expandable lengthwise belts and flares of the metal lengthwise belts.