The invention is a truck bed cover made from thermoplastic material. The top of the truck bed cover has a relatively smooth appearance. The underside of the bed cover comprises a support structure utilizing at least one “X”-type support. In the preferred embodiment, four “X”-type supports are utilized. A typical bed cover typically weighs less than 75 pounds for greater ease of handling, without loss of structural support strength over fiberglass covers from loads placed on the top of the bed cover.
1. A truck bed cover comprising:
a one-piece, top truck bed cover having an upper surface bounded by a front edge, a rear edge, a left edge, and a right edge, said upper surface having a curved portion between said front edge and said rear edge, said upper surface having a curved portion between said left edge and said right edge;
a support structure fixed to said top truck bed cover, said support structure having a plurality of ribless recessed substantially triangular areas supporting said top truck bed cover, and a support element forming an x-shape.
2. A truck bed cover according to claim 1 , wherein said support element is integrally formed with said support structure.
3. A truck bed cover according to claim 1 , wherein said support structure further comprises
a plurality of x-shaped support elements.
4. A truck bed cover according to claim 3 , wherein said plurality of x-shaped support elements comprises four.
5. A truck bed cover according to claim 4 , wherein each of said four x-shaped support elements is disposed in a quadrant of said support structure.
6. A truck bed cover comprising:
a one-piece, top truck bed cover having an upper surface bounded by a front edge, a rear edge, a left edge, and a right edge, said upper surface having a curved portion between said front edge and said rear edge, said upper surface having a curved portion between said left edge and said right edge;
a support structure permanently joined to said top truck bed cover to produce a double-walled bed cover, said support structure having a plurality of ribless recessed areas supporting said top truck bed cover, said support structure further having a first linear non-recessed support rib and a second linear non-recessed support rib, wherein said first non-recessed linear support rib intersects said second non-recessed linear support rib.