Patent ID: 8550276

Claim:
A tight and thermally insulated tank, the tank comprising a sealing barrier and a thermally insulating barrier, said sealing barrier having a regular polygonal cylindrical shape and comprising a vertical wall and a bottom wall, said vertical wall being made up of a plurality of vertical faces, said bottom wall comprising a plurality of sectors which are rotated images of each other in accordance with a predefined rotational angle, each sector consisting of a plurality of adjacent metallic rectangular pieces having an equal width and a plurality of identical metallic polygonal connecting pieces, wherein said bottom wall has the shape of a regular polygon, wherein said vertical wall forms a regular polygonal cylindrical surface having said regular polygon as a directrix, wherein each rectilinear side of the regular polygon corresponds to one of said sectors of the bottom wall and one of said faces of the vertical wall, the edges of the metallic rectangular pieces of one sector being respectively perpendicular and parallel to the rectilinear side of the polygon corresponding to said sector, wherein each polygonal connecting piece has a symmetrical quadrilateral shape, comprising two longer sides forming an angle equal to the predefined rotational angle and two shorter sides arranged at right angles to the longer sides, each shorter side having a length equal to one of the width and the half-width of the rectangular pieces, wherein the identical polygonal connecting pieces of a sector are arranged along an edge of the sector for connecting to the rectangular pieces of an adjacent sector, wherein a first one of the shorter sides of each polygonal connecting piece is parallel to the rectilinear side of the regular polygon corresponding to the sector and the second one of the shorter sides of each polygonal connecting piece is parallel to the rectilinear side of the regular polygon corresponding to the adjacent sector.