Float for covering surface of liquids e.g. inflammable liquids, in tank, has flat edge part extended from hollow body, where flattened sphere or base association of two pyramids is provided with polyhydric base

摘要

The float (12) has a flat edge part (14) extended from a hollow body (13). Thickness of the edge part is less than or equal to 4 mm. A section of the body in a plane of the edge part is inscribed in a first circle, and an external limit of the edge part is inscribed in another circle. Diameter of the latter circle is 125-175 times greater than diameter of the former circle. A flattened sphere or base association of two pyramids is provided with a polyhydric base. Thickness of a wall of the body is locally adjusted according to density of liquid.