Ships – Building – Freighters
Patent
1991-11-06
1993-09-28
Basinger, Sherman
Ships
Building
Freighters
B63B 2512
Patent
active
052478963
ABSTRACT:
A vessel for carrying a liquid cargo having a density less than that of the water supporting the vessel is provided with internal transverse and longitudinal bulkheads defining chambers of a total cargo storage space. A horizontal safety bulkhead extends longitudinally and transversely of the vessel and is connected to the sides, the end and intermediate transverse bulkheads and the longitudinal bulkheads, thereby forming the available liquid cargo storage space into a plurality of inner and outer upper and lower cells. This horizontal safety bulkhead is located to be below a predetermined waterline corresponding to a fully loaded condition of the ship, preferably at a distance between 5 ft. and 10 ft. below the waterline. Each of the upper and lower cells is individually vented to atmosphere. A suction pump applies suction to a suction line connected through one-way valves individually communicating with each of the inner and outer lower cells through openings in the horizontal safety bulkhead defining the same. The suction pump and the suction line are located between the waterline and the horizontal safety bulkhead to facilitate quick charging of the suction line with liquid cargo when the suction pump is operated. Rupture of the bottom or the side of the vessel at one of the lower cells at a point below the waterline is countered by operation of the suction pump and is assisted by the presence of a water head outside the rupture.
REFERENCES:
patent: 2065634 (1936-12-01), Warrick
patent: 4030438 (1977-06-01), Telfer
patent: 4157072 (1979-06-01), West
patent: 4241683 (1980-12-01), Conway
patent: 4347798 (1982-09-01), Gallagher
patent: 5101750 (1992-04-01), Dumas
"Designing Tankers to Minimize Oil Spills", The New York Times, Jun. 17, 1990.
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