Patent ID: 8096092

Claim:
A lightweight structural panel which comprises: a planarly extended outer skin of predetermined thickness, the outer skin being formed by a plurality of component layers which are each extended in a planar direction of the lightweight structural panel and complement one another in a direction of thickness to form the thickness of the outer skin and are interconnected, wherein the plurality of component layers comprises an inner component layer that is made of a plurality of planar elements, at least two of the plurality of planar elements being positioned adjacent to one another; wherein each of the plurality of planar elements comprises two component elements arranged on one side of the respective planar elements; wherein the component elements of adjacent planar elements form a plurality of stiffening elements, the plurality of stiffening elements being connected to the outer skin and arranged at a predetermined distance from one another, the plurality of stiffening elements being formed in one piece or integrally with the inner component layer; wherein at least one of the plurality of stiffening elements comprises a web region arranged substantially perpendicularly to the planar direction of the outer skin and extending in a longitudinal direction along the outer skin, the web region being formed in one piece with the planar elements of the inner component layer; wherein at least one of the plurality of stiffening elements comprises a flange region extending substantially parallel to the planar direction of the outer skin, the flange region being formed in one piece or integrally with the web region; and wherein at least one of the plurality of stiffening elements has an inverted J-shaped cross section or box-shaped cross section, of which a vertical leg forms the web region and another leg forms the flange region.