Wind deflector for a towing vehicle

Claim 1

In combination a towing vehicle having a roof, a trailer connected to said vehicle, and a wind deflector mounted to said vehicle roof and positioned in front of said trailer for deflecting air flow over said trailer, the improvement wherein said deflector includes a sheet part having side edges extending between a leading edge directed toward the front of said vehicle and a trailing edge directed toward the rear of said vehicle, said sheet part having an upper planar surface and a lower surface, said sheet part trailing edge positioned above the level of said sheet part leading edge, baffle means spaced from said vehicle roof and carried at the lower surface of said sheet part adjacent said sheet part leading edge, said baffle means extending from one side edge to the other side edge of said sheet part and including a front surface section extending from the leading edge of the sheet part divergently away from said sheet part lower surface and a rear surface section extending rearwardly from said front surface section and adjoining said lower surface of the sheet part at a location spaced between said leading and trailing edges of the sheet part, said baffle means for displacing air contacting said leading edge of the sheet part and causing a part of said air to be diverted first under and away from said sheet part and then toward said sheet part lower surface between said baffle means rear surface section and sheet part trailing edge to reduce air flow eddies between said sheet part and trailer and to create an increased downward force upon said vehicle.