Ships for liquid cargoes
AssigneeThe British Petroleum Company p.l.c.
InventorIan Edmund Telfer
Life of this patent
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Abstract
A ship for liquid cargoes, e.g. an oil tanker, has two longitudinal bulkheads giving central and wing areas and transverse bulkheads dividing the areas into tanks. The wing areas have upper cargo tanks and lower ballast tanks, but the latter have vertical portions extending to deck level giving for example an L-shaped configuration.
Claims11
In a ship for carrying liquid cargoes having at least two longitudinal bulkheads separating a central tank area from wing tank areas and transverse bulkheads dividing the central and wing tank areas into a number of tanks, the improvement comprising two sets of tanks in each of the wing tank areas, one lower set, suitable for holding ballast, extending beneath the other upper set, suitable for holding cargo, but with the tanks of the lower set having vertical portions extending to deck level and a horizontal flat extending along the length of the wing tank areas between the upper and lower sets of tanks, the flat being solid between the sets of tanks and perforated where it passes through the vertical portions of the lower set of tanks.
A ship for carrying liquid cargoes having at least two longitudinal bulkheads separating a central tank area from wing tank areas and transverse bulkheads dividing the central and wing tank areas into a number of tanks, characterized in that the wing tank areas contain two sets of tanks, one lower set, suitable for holding ballast, extending beneath the other upper set, suitable for holding cargo, but with the tanks of the lower set having L-shaped configurations, with the horizontal portion of the L extending longitudinal and the vertical portion extending to the deck level, said wing tank areas further having a horizontal flat extending along the length of said tank areas between the upper and lower sets of tanks, said flat being solid between the sets of tanks and perforated where it passes through the vertical portions of the lower set of tanks.
Dependencies are inferred from the claim text.