US Patent 10081391 Bi-rectangular vehicle beam with cellular structure

A vehicle structural beam includes four inner walls, four outer walls, and a plurality of ribs. The four outer walls and the four inner walls respectively form outer and inner rectangular tubes. The inner tube is disposed within the outer tube such that the outer walls are non-parallel with the inner walls. Each of the plurality of ribs are disposed between the outer and inner walls. The plurality of ribs is arranged to define a plurality of triangular and/or quadrilateral cells between the outer and inner tubes.