Abstract: An automatic lifting mud flap assembly for a motor vehicle includes at least two identical flap control boxes or housings. Each box is detachably mounted on the motor vehicle in the location of the mud flap after the standard mud flap is removed, and the mud flap is then mounted on the mounting box using standardized fittings. Lifting bars are detachably attached to the mud flaps adjacent their lower edge. A cable is securely connected inside the box and extends outside the box for connection to the lifting bar. An air cylinder and pulley system inside the housing controls the extent of the cable outside the box, and the air cylinder is operatively connected to the pneumatic system of the vehicle through an electric air valve which retracts or extends the cable, thus raising or lowering the mud flap. The electric air valve can be actuated manually from the vehicle cab or automatically by connection to the rear back up lights to raise the flaps when the vehicle is put into reverse gear.

Abstract: An automatic lifting mud flap assembly for a motor vehicle includes at least two identical flap control boxes or housings. Each box is detachably mounted on the motor vehicle in the location of the mud flap after the standard mud flap is removed, and the mud flap is then mounted on the mounting box using standardized fittings. Lifting bars are detachably attached to the mud flaps adjacent their lower edge. A cable is securely connected inside the box and extends outside the box for connection to the lifting bar. An air cylinder and pulley system inside the housing controls the extent of the cable outside the box, and the air cylinder is operatively connected to the pneumatic system of the vehicle through an electric air valve which retracts or extends the cable, thus raising or lowering the mud flap. The electric air valve can be actuated manually from the vehicle cab or automatically by connection to the rear back up lights to raise the flaps when the vehicle is put into reverse gear.