| 摘要 |
The present invention concerns a receptacle for the storage of fluid under pressure and comprising an internal casing with axis X,X' and having one central cylindrical section and two extremity sections, an armouring encompassing said casing and leaving clear at the convex extremity section a cap centered on axis X,X'. According to the invention, the outer contour (8) of said convex extremity section (2b) of the casing (2) has, as a longitudinal section, a shape which is at least approximately elliptical so that the ratio G of the small half axis to the major axis is such that: 0.32</=G</=0.4 (I) where the major axis corresponds to the outer diameter of the central cylindrical section (2a) of the casing (2), and the thickness ei of said convex extremity section (2b), said cap (6) being excluded, varies according to the formula: <IMAGE> (II) in which: Ri=distance to the axis X,X' of the point of the outer contour (8) of said convex extremity section (2b) at which the thickness ei is measured, e=thickness of the casing (2) at its central cylindrical section (2a), R=external radius of the central cylindrical section (2a), R1=radius of the base of said cap (6), and e1=thickness of the casing (2) for Ri=R1, the thickness of said cap (6) being at least equal to e1. The invention is applicable more particularly to gas cylinders.
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