Storage tank

A cubical-shaped storage tank comprising 12 equal diameter and equal length portions of cylindrical shells, three of said shells forming each corner of said tank and four of said shells forming each side of said tank, said portions of the cylindrical shells being formed by removing an arc length section of the circumference of each of the cylindrical shells and also by removing that portion of the ends of each of the cylindrical shells defined by diagonally intersecting planes produced at both ends of the cylindrical shell portions resulting from the intersection of said three cylindrical shell portions placed perpendicular to each other at each corner forming a generally cubically shaped outer boundary, said intersecting cylindrical shell portions at each corner forming an aperture closed by spherically shaped caps forming a continuous tank surface, said spherically shaped caps consisting of that portion of the surface of a sphere of equal diameter to that of the cylindrical shells, and said four cylindrical shell portions which make up each side of the cubical shape defining an aperture in the middle of each of said sides, said aperture being closed by four identical parts of a cylindrical surface connected together forming a closed cap, the base of said cap forming a continuous surface tangent with the aperture defined by said cylindrical shell portions and extending inwardly into said tank.