Vessel for transport of buoyant cargo

Details Vessel for transport of buoyant cargo Vessel for transport of buoyant cargo

1975-06-03

1976-11-23

Blix, Trygve M.

Ships

Ice boats

114198, B63B 3542

Patent

active

039930122

ABSTRACT:
A vessel for transport of a floating buoyant cargo such as barges, lighters, and pontoons, wherein the cargo is partially supported in the vessel by its own buoyancy. The hull has an imperforate bottom shell with rigid submarine cargo-supporting and hull-reinforcing structure, a bow, a stern, side walls providing a series of buoyancy compartments, and a hollow enclosed interior including a cargo hold. Water can be introduced into or expelled from the buoyancy compartments to adjust the draft, trim, and list of the vessel. The cargo-supporting and hull-reinforcing structure has openings communicating with the hold and providing a bottom chamber that is always flooded during the voyage but can be pumped out for maintenance and repair. A series of water conduits pass to the ocean at intervals along the length of the hold, each conduit being located (when the vessel is level) at all points above the top of the bottom chamber. The conduit preferably has a horizontal inlet portion communicating with the ocean, a horizontal outlet portion communicating with the hold, and a connecting inverted U-shaped portion above and connected to both horizontal portions. A tube extends upwardly from the upper end of each inverted U-shaped portion and has an on-off valve at its upper end, for maintaining or breaking the siphon effect of the conduits.

REFERENCES:
patent: 1533776 (1925-04-01), Tiburtius
patent: 3133518 (1964-05-01), Burnett
patent: 3400681 (1968-09-01), Clay

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