Abstract: An internal reinforcing element for a plastic tank for a motor vehicle is made as a single piece and includes: a central portion which in cross section is in the shape of an annulus sector, defining a main axis of the reinforcing element and having a first surface area, the central portion including a network of ribs extending radially in relation to the main axis, referred to as network of radial ribs; and two axial end portions which are situated one on each side of the central portion when considering the main axis, each of the axial end portions having an end surface of curved and oblong shape inscribed inside the cross section of the central portion and having a second surface area smaller than the first surface area.

Abstract: An internal reinforcement element for a tank made of plastic for a motor vehicle includes: a central structure including a first system of ribs including at least three primary ribs joined to one another and a second system of ribs including at least two secondary ribs. The sides of the primary ribs opposite the sides form a joint and the sides of the secondary ribs opposite the sides joining the primary rib define a projected surface from the central structure having a first peripheral geometric shape. A first end and a second end located on both sides of the central structure include a weld region, the first end and the second end having a second peripheral geometric shape forming a transition between the first peripheral geometric shape and a third peripheral geometric shape.

Abstract: An internal reinforcing element for a plastic tank for a motor vehicle is made as a single piece and includes: a central portion which in cross section is in the shape of an annulus sector, defining a main axis of the reinforcing element and having a first surface area, the central portion including a network of ribs extending radially in relation to the main axis, referred to as network of radial ribs; and two axial end portions which are situated one on each side of the central portion when considering the main axis, each of the axial end portions having an end surface of curved and oblong shape inscribed inside the cross section of the central portion and having a second surface area smaller than the first surface area.