Ships – Ballasting – Water tanks
Patent
1979-10-05
1981-07-07
Blix, Trygve M.
Ships
Ballasting
Water tanks
114260, 114 45, B63B 4306
Patent
active
042768497
ABSTRACT:
A submersible vessel, such as a barge, has a plurality of ballast compartments, each of which communicates with the exterior of the vessel through a separate riser, each terminating in an elongate vertical opening in the hull of the vessel. A vertically movable gate is positioned over said openings. At its uppermost limit of travel, the gate provides a conduit into the bottom portion of said openings so that water may be drawn into the ballast compartments through the risers in response to suction applied to the ballast compartments, thereby submerging the vessel. To raise the vessel, the gate is lowered to uncover the uppermost portion of said openings. Positive air pressure is applied to the ballast compartments to move the water upwardly through the risers and out of the vessel over the top of the gate. The gate is lowered as the ballast compartments are emptied, thereby effectively reducing the heights of the risers as the water level in the ballast compartments descends, so that a constant, low pressure can be used for de-watering. With such a riser and gate system at each corner of the vessel, self leveling during the raising process can be achieved by proper positioning of the gates.
REFERENCES:
patent: 903598 (1908-11-01), Mehlhorn et al.
patent: 984133 (1911-02-01), Giese
patent: 3797440 (1974-03-01), Pangalila
patent: 3886886 (1975-06-01), Anders
Blix Trygve M.
Sotelo Jesus D.
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