Abstract: A lightweight reinforced seat assembly for a transportation vehicle is disclosed which includes a molded seat shell having a shell exterior and a shell interior. The seat shell includes a seat section and a back section joined together by a generally curved section. A plurality of seats is formed in the seat shell. A reinforcing network of longitudinal and lateral, generally enclosed tubular rib elements reinforce the seat shell to eliminate metal framing and weight. The reinforcing rib network includes a front tubular rib element extending laterally across a front width of the seat section, and a top tubular rib element extending laterally across a top width of the back section. Longitudinal edge tubular rib elements extend on opposing edges of the seat shell generally through the seat-section, curved section, and back-section. The edge tubular rib elements are connected to the front and top tubular rib elements.

Abstract: A lightweight reinforced seat assembly for a transportation vehicle is disclosed which includes a molded seat shell having a shell exterior and a shell interior. The seat shell includes a seat section and a back section joined together by a generally curved section. A plurality of seats is formed in the seat shell. A reinforcing network of longitudinal and lateral, generally enclosed tubular rib elements reinforce the seat shell to eliminate metal framing and weight. The reinforcing rib network includes a front tubular rib element extending laterally across a front width of the seat section, and a top tubular rib element extending laterally across a top width of the back section. Longitudinal edge tubular rib elements extend on opposing edges of the seat shell generally through the seat-section, curved section, and back-section. The edge tubular rib elements are connected to the front and top tubular rib elements.

Abstract: A rooftop drag reducing device includes a lower base portion fixedly mounted to the roof of a truck for semi-trailers. An upper portion of the drag reducing device is selectively movable relative to the base portion between a fully extended operating position, and a fully retracted storage position. In the fully retracted position, the upper portion is received within the lower portion such that at least part of the top surface of the lower portion is above the top surface of the upper portion. The design in accordance with the present invention increases the overall stability of the drag reducing device in both the extended and retracted positions, provides enhanced protection for the upper portion in its retracted position fully received within the lower portion, provides greater clearance than is possible with known drag reduction devices, and increases the maximum elevation within the cab or sleeper compartment of the vehicle to which the drag reduction device is mounted.