An aerodynamic mud flap includes a body having a first lateral side, an opposite second lateral side, an upper end, an opposite lower end, a front face, and an opposite rear face. The body extends in a horizontal, vertical, and transverse directions. The body has a generally planar upper portion extending vertically from the upper end to a horizontal transition line, and an arcuate lower portion extending vertically from the transition line to the lower end. The lower portion is curved along the vertical direction such that the lower end of the body is offset from the upper end in the transverse direction and is disposed rearward of the upper end. A plurality of octagonal openings in the body extend from the front face to the rear face to allow for air flow through the mud flap from the front side to the rear side.

Embodiments include a mud flap having a barrier section configured to intercept and deflect matter discharged from the tire when rotating during vehicle operation. The barrier section including a plurality of horizontal louvers, each horizontal louver forming an elongate member having a length extending primarily in a direction of the mud flap width, where the plurality of horizontal louvers are spaced apart in the direction of the mud flap height in the form of an array, where the plurality of horizontal louvers are configured to intercept and deflect matter of a minimum size traveling along any linear trajectory path from the outer circumference of the tire/wheel assembly towards the front side of the mud flap while substantially maximizing the spacing between adjacent louvers to minimize aerodynamic drag. Other embodiments provide a method of using the mud flap.

A mud flap retraction system uses two artificial muscles that extend horizontally toward the mud flaps to an elbow, and then hang down alongside the mud flaps opposite the vehicle tire. Also provided is a source of compressed air or fluid, at least one valve for selectively inflating and deflating, the bladder(s), and an operator control inside the vehicle cabin that quickly and reliably raises (or lowers) the mud flaps at the operator's command. Inflation effectively raises the artificial muscles from a limp position (hanging with the mud flaps) to a stiff raised position (thereby raising the mud flaps rearwardly).

Systems and methods for controlling movement of a mudflap hanger arm, to reliably return from a deflected position to a resting position, while providing improved manufacturability and reduced corrosion and wear through the use of guidance surfaces on a mounting plate and a frame seat that form the interface between the hanger arm and a vehicle frame. When the hanger arm pivots about an axis on one side of the mounting plate and frame seat, guidance surfaces on the opposite side are in contact or near-contact, preventing the mounting plate and frame seat from being laterally displaced or rotated with respect to each other. The improved mounting plate and frame seat can reduce or eliminate manufacturing operations such as welding, coating, etc., reducing the cost of the apparatus, while enhancing manufacturability and operation.

A weight and anti-curling device is provided for a mud flap with the mud flap having an upper end, a lower end, a first side, a second side, a front side and a rear side. The weight of this invention is comprised of a support member. The support member is positioned at the rearward side of the lower end of the mud flap. Bolts extend through the support member and the mud flap to secure the weight to the lower end of the mud flap. The support member may be positioned at the forward side of the mud flap.

A mud flap mounting assembly and system is disclosed. A vehicle body and mud flap are provided as part of the overall system. Advantageously, a toollessly-operated mud flap clamp assembly is provided. The mud flap clamp assembly includes a plurality of mud flap clamp units installed on the vehicle body. Each of the plurality of mud flap clamp units includes a flap clamp bracket, a flap pressure plate, and a flap clamp. Each flap clamp bracket selectively engages a first side of the mud flap, and each flap pressure plate selectively engages a second side of the mud flap. Each flap clamp is operable to a first position such that a clamping force is applied to each respective flap pressure plate and such that the mud flap is frictionally engaged with and retained by each respective flap clamp bracket and each respective flap pressure bracket.

Embodiments include a mud flap having a barrier section configured to intercept and deflect matter discharged from the tire when rotating during vehicle operation. The barrier section including a plurality of horizontal louvers, each horizontal louver forming an elongate member having a length extending primarily in a direction of the mud flap width, where the plurality of horizontal louvers are spaced apart in the direction of the mud flap height in the form of an array, where the plurality of horizontal louvers are configured to intercept and deflect matter of a minimum size traveling along any linear trajectory path from the outer circumference of the tire/wheel assembly towards the front side of the mud flap while substantially maximizing the spacing between adjacent louvers to minimize aerodynamic drag. Other embodiments provide a method of using the mud flap.

A mud flap system is provided comprising a mounting device having a top and bottom including a walled recess extending into an inner volume of the mount and exiting out the bottom. The assembly also includes an elongated suspension bracket having a proximal end to the recess, a distal end defining a length and a thru slot running along the length, a stem extending from a bottom of the bracket at the proximal end, enabled to be inserted into the recess and out of the mounting device. A mud-flap is provided having a top having a thickness and a bottom of the mud flap is inserted through the slot and the thickness at the top suspends the mud flap until force applied to the mud flap causes the thickness at the top to deform and pass through the slot thereby releasing the mud flap from the suspension bracket.

A dump truck includes an engine provided in an engine compartment, and a pair of fenders provided at a rear side of the engine compartment and provided at a distance in the vehicle width direction. The dump truck includes the fender having a fender inclination plate extending so as to incline downward along a rear portion of each front wheel, and a shield portion having a shield inclination plate inclined downward while directing rearward between the pair of fenders and both ends of which in the vehicle width direction are connected to the respective fenders.

A mud flap for a wheeled vehicle includes an upper mounting portion and an extended protection portion. The extended protection portion includes at least two areas with slotted air flow openings. An upper slot area includes rows of elongated slots with the slots arranged in columns in each row. A lower slot area includes rows of elongated slots with the slots arranged in columns in each row. The slots in the upper slot area have heights that are greater than the heights of slots in the lower slot area. In some embodiments, a middle slot area is positioned between the upper slot area and the lower slot area. The slots in the middle slot area have different heights in different rows. In some embodiments, at least a portion of the slots in the upper slot area is replaced with diagonal mounting features.