ROOF TOP DRAG REDUCING DEVICE

摘要

A roof top drag reducing device includes a lower base portion mounted to or formed integrally with the roof of a truck for semi-trailers. An upper portion of the drag reducing device is selectively movably mounted relative to the lower base portion between a first elevated operative position atop the lower base and a second non-operative retracted position generally forward of and below the lower base portion. The top portion of the drag reducing device will be in its elevated operative position when a trailer is attached to the truck and reduction of air resistance over the trailer is desired. The top portion of the drag reducing device will be in its forward non-operative position when, for example, several cabs are being towed and transported together from one location to another. If the lower base portion is formed integrally with the roof of the truck, the lower base portion can form the ceiling of a sleeper compartment or area of the truck to significantly increase the height of the sleeper area.