Patent ID: 8584866

Claim:
A vibratory screen comprising: a flexible molded polyurethane body having substantially parallel side edge portions at opposite ends of the body, a lower edge portion transversely disposed between the side edge portions, an upper edge portion disposed between the side edge portions and substantially parallel and opposite to the lower end portion, an upper surface, a lower surface, a first integrally molded grid structure, a second integrally molded grid structure, a third integrally molded grid structure and screen openings, wherein the first grid structure includes first and second members forming the screening openings, the first members substantially parallel and extending transversely between the side edge portions and the second members substantially parallel and extending transversely between the lower edge portion and the upper edge portion, wherein the second grid structure includes third and a fourth members, the third and fourth members having a thickness greater than the first and second members and having a portion extending downwardly below the lower surface of the body, the third members substantially parallel and extending transversely between the side edge portions and having multiple first members therebetween, the fourth members substantially parallel and extending transversely between the lower edge portion and the upper edge portion and having multiple second members therebetween, first reinforcement members molded integrally with the third and fourth members, wherein the third grid structure includes fifth and sixth members, the fifth and sixth members having a thickness greater than the third and fourth members and having a portion extending downwardly away from the lower surface of the body, the fifth members substantially parallel and extending transversely between the side edge portions and having multiple third members therebetween, the sixth members substantially parallel and extending transversely between the lower edge portion and the upper edge portion and having multiple fourth members therebetween, second reinforcement members molded integrally with the fifth and sixth members.