Abstract: A bug shield mounted on the hood of a tractor to deflect bugs from colliding with the vehicle's windshield, without forming fastener-receiving openings in the tractor body.

Abstract: There is disclosed herein a fluid containment device secured to, or integrated within a vehicle cowl or louvered panel serving to divert water or windshield washer fluid "run-up" away from the operator's line of vision. Such run-up of fluid tends to occur in the vicinity of the ends of a wiper blade at the end of its final or intermittent downward stroke. The fluid containment device is formed to include a ramped lead-in front surface and a vertically oriented trailing surface, creating a high pressure, low velocity space adjacent the rear surface thereof, causing a turbulent airflow to circle downwardly and spiral laterally. The result is to urge the fluid downward toward the base of the louvered panel, and laterally toward the outboard sides of the windshield.

Abstract: A rear air deflector is provided for vans, trucks, and sport utility vehicles having cargo doors which open side to side, and windows in the cargo doors. The deflector includes a pair of mirror image shield portions having outer ends which are secured to the window frame of the cargo doors with a bracket extending around the edge of the window. The inner ends of each shield portion are secured to the window frame with a stantion having a bracket extending over the top edge of the window for securement into the window frame. In an alternative embodiment, a unitary shield for use on vehicles having a swing-up rear door utilizes a single stantion pressfit with adhesive to the door window at the midpoint of the deflector, and mounting brackets at each end which wrap around the edge of the window for securement into the window frame.

Abstract: Several embodiments of aerodynamic devices for improving the drag coefficient and reducing the wind resistance of a body moving through the air such as a motorcycle and/or a helmet worn by a rider of the motorcycle. The aerodynamic devices comprise a plenum chamber to which air is delivered through a relatively small ram air inlet opening. Air is discharged from the plenum chamber through a plurality of small apertures for generating a thin turbulent boundary layer between the body surface and the air flowing across the surface to promote laminar flow across the body surface.

Abstract: An improved shield which is readily attached or detached at the forward edge portion of a hood of a vehicle. The shield has a longitudinal member of flexible material laterally extending across the front edge of the hood. The longitudinal member has an upper section adapted to engage the upper surface of the hood and a lower section adapted to engage the underside of the hood. The longitudinal member further has a linking section linking the upper and lower sections and shaped to apply a spring force to the vehicle hood so that the vehicle hood is resiliently clamped between the upper and lower sections of the shield by the spring force.

Abstract: An aero deflector for vehicles including, for example, trucks, vans, and sports utility vehicles. In the illustrated embodiment, the aero deflector is molded from a single piece of material and has a plurality of air intakes and a conforming mounting flange which is attached to the vehicle surface by adhesive mounting tape.

Abstract: A vehicle windshield bug and debris deflector is mounted on a rearwardly extending flange portion underlying the front portion of a vehicle hood. The deflector, extending substantially the full width of the vehicle hood, comprises a shield having a linear portion, a sharply curved portion, and an upstanding bug deflection portion, at least one attachment strip, and at least one resiliently deformable stabilizer. The attachment strip, having adhesive on both top and bottom surfaces, attaches the upper surface of the linear portion of the shield to the rearwardly extending flange portion underlying the front portion of the vehicle hood. The stabilizer, having adhesive on one surface, attaches to the lower surface of the linear portion of the shield.

Abstract: A rear air deflector is provided for vans, trucks, and sport utility vehicles having cargo doors which open side to side, and windows in the cargo doors. The deflector includes a pair of mirror image shield portions having outer ends which are secured to the window frame of the cargo doors with a bracket extending around the edge of the window. The inner ends of each shield portion are secured to the window frame with a stantion having a bracket extending over the top edge of the window for securement into the window frame. In an alternative embodiment, a unitary shield for use on vehicles having a swing-up rear door utilizes a single stantion pressfit with adhesive to the door window at the midpoint of the deflector, and mounting brackets at each end which wrap around the edge of the window for securement into the window frame.

Abstract: This invention relates to a structure of a variable triangular warning light for a third braking light in a rear turbulence plate of an automobile, in particular, to an "LED" third braking light which is hidden within the rear turbulence plate, and can be formed into a flashable triangular failure warning light by means of pulling-out, folding and locking means to indicate a failure when the automobile is in failure, characterized in that the rear turbulence plate is provided with a receiving groove, receiving tubular holes and springs, and a three-section typed "LED" third braking light of an elongate strip shape having hinges is a foldable structure; live lock member can be used as disengagement/engagement means for the outward pulling or inward inserting of the three-section typed third braking light.

Abstract: A heavy duty truck bug and gravel shield that has minimum parts and a maximum deflecting ability. It also is designed to minimize shield vibration.

Abstract: A hood protective shield for use on a front portion of a motor vehicle's hood protects against insects and road debris damage. The shield comprises a main body member, a lip member extending therefrom and a set of spacers attached to the underside of the main body member. The main body member is shaped to fit the contour of the front portion of the hood and extends laterally substantially fully across the hood and extends longitudinally partially from a front edge thereof. The lip member wraps around the edge of the hood to engage an underside of the hood and hold the shield in a semi-permanent, though secure fashion to the hood.

Abstract: Vehicle mountable subsystems include a modified nose cone, deflecting air between the trailer and its tractor. Drag at the rear is reduced by vertical vanes at its rear corners, mounted by spring biased supports to allow opening rear doors and restoring the deflecting positions upon closing. Air from the top is deflected downwardly across the rear through a transverse upper scoop. A transverse lower scoop directs air from under the trailer upwardly across its rear surface. Both scoops are fabricated from a resilient material to allow compression against a loading dock structure. An undercarriage enclosure, fabricated into a number of longitudinal segments determined by trailer length, having side skirts and a trailer width upper panel, includes an air deflecting front surface and a channeled rear transverse surface. Flexible skirt extension panels depend toward the roadway.

Abstract: The invention relates to a windshield deflector shield for deflecting insects and debris above the hood and windshield of a vehicle and for increasing the driver's field of vision. The deflector shield includes a lens coupled to the middle deflector section for increasing the field of vision in front of the vehicle. The deflector shield may also include rearview mirrors coupled to the ends of the deflector shield for increasing the driver's field of vision at the sides of the vehicle.

Abstract: An air deflector for a roof opening has an upper shield unit and a lower mounting strip. The mounting strip has a narrow portion to allow flexibility in conforming to the roof surface.

Abstract: A rear air deflector includes a shield which is mounted directly to a vehicle using expandable insert style fasteners. The shield is spaced apart from the window frame, except at the ends of the shield which engage the frame. The shield is concave substantially along its length, though the ends are flattened for mating engagement with the window frame. The opposite end portions of the shield have a reverse-curve profile such that the ends are parallel to the window frame surface for mating engagement with the surface. The direct mounting of the deflector to the vehicle eliminates the need for mounting brackets.

Abstract: An air current deflector shield is provided having a substantially horizontally disposed base portion and an integrally formed deflecting portion extending upwardly from the base portion so as to deflect air over the windshield of a motor vehicle. The shield is mounted to the hood of the vehicle with a plurality of quick release fasteners, including a grommet having a plurality of expandable legs, and a plunger slidably positioned within the grommet for movement between a locked position and an unlocked position. When the plunger is moved to the locked position, the legs of the grommet are expanded into frictional engagement with holes in the hood of the vehicle, so as to securely mount the shield upon the hood. When the plunger is moved to the unlocked position, the legs of the grommet are collapsible for withdrawal from the holes in the hood, such that the shield can be quickly and easily removed from the hood.

Abstract: A deflector structure is arranged for mounting to a vertical rear panel of an associated vehicle, having rear panel windows directed therethrough. The air deflector structure is arranged for mounting above and below the windows, wherein each deflector member includes a first plate mounted to the rear panel, and a second plate hingedly mounted for pivotal movement to the first plate. Mounting is effected by mechanical fasteners, or alternatively mechanical fasteners in combination with magnetic mounting plates.

Abstract: The specification describes a preferred embodiment of the square-backed vehicle air foil 10 for attaching to a vehicle 12 adjacent an upper rear edge 21 for projecting into a horizontal airstream "S" for subdividing the airstream into an inner or first airstream layer S.sub.1 and an outer or second airstream layer S.sub.2. The assembly 10 has an inner air foil element 32 that directs the first airstream layer rearward and then rearward and downward over the rear edge 21 and then downward at a first velocity along the rear vehicle panel 21 to form a first air curtain along the rear panel to keep the rear panel clean. The assembly 10 has an outer air foil element 34 that, in cooperation with the inner foil element 32, directs the second airstream layer S.sub.2 rearward along the roof panel while accelerating the layer S.sub.2. The layer S.sub.

Abstract: A structural reinforced injection-molded fiberglass visor shell has a laterally extending upper member which extends frontwardly above and provides shade to a vehicle windshield. Three attachment pods extend downwardly from the upper member and have pod floors which conform to the geometry of a vehicle cab upper surface. Side walls extend upwardly from the pod floors and are connected to the upper member. Access holes are provided in the upper member for the insertion of fasteners through the pod floors into the vehicle cab surface. Alternatively, the pod floors may be adhesively attached to the cab by means of structural adhesive tape or bolt-retaining strips adhesively taped the cab surface. The same visor shell may be economically manufactured for a wide variety of vehicles by substituting different pods configured for a particular make of vehicle.

Abstract: A truck body includes a rear wall, with the rear wall arranged to receive a plurality of "L" shaped air duct members, each including a first and second intercommunicating pneumatic conduit to direct air from side walls of the truck body to the rear wall to enhance cleaning of the rear wall of the truck minimizing separation of vacuum at a trailing surface of the truck to increasing resistance of a truck resulting in decreased fuel economy.

Abstract: A combined automobile deflector and side view mirror unit is attached to a front edge of a window frame of an automobile door. The automobile deflector and side view mirror unit comprises a mirror housing secure to the window frame and supporting a side view mirror, and a shroud having a leading edge extending along the periphery of the front edge of the window frame and attached thereto. The shroud also has a curved portion for enclosing the side view mirror, the curved portion attached to the mirror housing.

Abstract: A hood scoop assembly for selective placement upon an external surface of an automobile vehicle, a boat and the like comprises a hood scoop body portion having a front end portion, a back end portion and an underside. Removably fittable in the underside of the back end portion is a panel unit. The panel unit may be either a filler panel having an insignia or a name place thereupon, or may be a signalling and indicating box unit that is situated facing the driver to thereby visually deliver to the driver pertinent information relating to the operating condition of the vehicle. The panel unit is held either to a flange situated along the back end portion or may be disposed within a channel defined on the underside of the hood scoop body and positioned approximately at the back end portion thereof. Alternatively, the panel unit may be removably attached directly to supports provided in the "open" end of the scoop. This embodiment may be modified to provide vertical adjustment of the panel unit.

Abstract: A vehicle shield device is provided for mounting on a front of a vehicle. The vehicle shield device has a hood protector portion and a fender protector portion for protecting portions of the hood and the fender from contact with airflow. The vehicle shield further includes an airflow deflector portion extending from a back edge of the hood protector portion for deflecting airflow away from a windshield of the vehicle. The hood protector portion, the fender protector portions, and the airflow deflector portion cooperate to form a continuous airflow engaging surface extending across a portion of the front of a vehicle.

Abstract: A deflector formed of a unitary strip of flexible material which is fastened to the vehicle hood at an edge immediate adjacent to the vehicle windshield. The deflector includes an upper wall part which directs bugs, water, debris and air away from and over the windshield to keep the windshield clean and to improve the handling and aerodynamics of the vehicle. The deflector further includes a securement to the rear edge of the hood, such as a clamp, and/or adhesive tape and/or a horizontal and a downward flange. The deflector is formed of plastic which is configured to bend to conform with the curvature of the rear edge of the hood. The deflector may be transparent, such as clear or transparent colors.

Abstract: A single piece air streamlining deflector shield for a motor vehicle that is mounted transversely, behind the leading edge of the hood of the vehicle, and which because of unique shape and construction is self-supporting transversely over the hood to sub-surface mounting positions on the inner lateral edges of the hood, and has a shape and construction that directs a volume of generally oncoming air, incident the front of said vehicle when in a forward motion, to pass unobstructed by the shield or mounting hardware under as well as over the leading edge of the shield. The shield then directs the airflow both over the upper surface and under the lower surface of the shield to combine behind the rearward edge of the shield, there conjoining to form a far superior dynamic airflow which is then, because of the aforementioned shape of the shield, more accurately directed over and around the windshield of said vehicle to deflect debris and streamline airflow.

Abstract: A wind deflector for mounting on the side of a truck cab, comprising a vertically elongated panel of transparent material; two flanges, one at each vertical end of the panel; two bends connecting the flanges to the panels; and two reinforcing plates for strengthening the panel along the bends. The panel is preferably a thick sheet of transparent plastic bent at its vertical ends to form the flanges. Each reinforcing plate includes a vertical portion secured flush against a portion of the panel and a horizontal portion secured flush against one of the flanges. The wind deflector also includes a mounting assembly for mounting the wind deflector to the truck cab. In one embodiment, the mounting assembly includes a threaded stud projecting through one of the reinforcing plates and one of the flanges, and a mounting bracket. The mounting bracket includes a planar arm portion having a slot dimensioned to receive the threaded stud.

Abstract: A shield for protecting the windshield and paint finish of the hood of an automobile from impact by insects and debris. The shield has an airfoil to deflect air current carrying debris and insects away from the windshield. The shield also covers the most vulnerable surface of the hood. To facilitate easy installation, the shield may be shaped like a pocket which snugly fits over the front edge of the hood panel.

Abstract: A streamlined truck cab fairing (15) for use with a pickup truck which may be mounted on the truck cab (1) without interfering with the operation of a truck bed cover. The fairing (15) includes a left panel (17) a central member (16) and a right panel (18), the lower edges (20,22) of the fairing (15) being remotely spaced from the sidewalls (14) of the truck bed, thereby forming a gap (59) through which a sheetlike cover may pass to completely seal off the truck bed region. A plurality of air inlets (29,30,31) cost the relative wind to create a reaction force pressing the fairing (15) towards the truck. A side panel reinforcing member (48) is used to reduced vibration of the fairing side panels (17,18).

Abstract: The present invention provides a wind deflector for a sunroof which has a deflector panel rotatably mounted on a roof through hinges each including a first hinge piece and a second hinge piece pivotally connected to each other through a hinge pin forward of the front end of an opening in a roof, the first and second hinge pieces extending downwardly to a position above a rain gutter under the opening in the roof. As a result, the invention significantly reduce the level of wind throb and wind noise and prevents rainwater from entering into the passenger compartment of a vehicle.

Abstract: A shield assembly for attachment to the hood of the road vehicle wherein the shield assembly includes a one-piece deflector unit with a principal section adapted to protect the exterior surface of the vehicle hood and a rearwardly extending mounting section, a plurality of mounting brackets, each including hood attachment and shield attachment sections, with the mounting brackets being secured to the shield by frangible fasteners having an ultimate yield strength such that forces tending to separate the deflector unit from the brackets will cause the fasteners to break before the elastic limits of the deflectors unit are reached or exceeded.

Abstract: A universal tow guard for mounting to the front of a towed vehicle. There are first and second planar plastic shield members having a lip around top, bottom, and outer edges thereof. Each has an upper mounting point adjacent the top outer edge and a lower mounting point adjacent the bottom outer edge. Each also has a plurality of horizontal support bracket holes adjacent the bottom edge, a plurality of horizontal strut hole vertical pairs adjacent the top edge, and a plurality of horizontal width adjustment hole vertical pairs adjacent an inner end thereof. The second shield member slidably fits within the lips of the first shield member. There are a pair of adjustable struts for connection between selected ones of the strut hole vertical pairs and a front surface of the vehicle. There are also a pair of support brackets for connection to selected ones of the support bracket holes and for resting on the vehicle bumper.

Abstract: A wind deflector for boosting debris over an automotive windshield is pivotally mounted at the front edge of an automotive hood. The rotational position of the deflector may be adjusted between an open or erect position and a closed position where the deflector is collapsed against the hood of the vehicle.

Abstract: A construction of side corner portions of a motor vehicle, wherein air blow-out openings are respectively formed on right and left side corner portions at least either on a front portion or on a rear quarter portion of the motor vehicle, and, when crosswind is received during running of the motor vehicle, air is blown out through the air blow-out opening of the side corner on the leeward side, whereby air stream generated along the side corner on the leeward side is separated from the surface of a vehicle body, so that negative pressure is not generated on the side corner on the leeward side, thus decreasing the yawing moment applied to the motor vehicle.

Abstract: A cowling assembly is mounted on a front portion of the frame of a motorcycle. The cowling assembly includes a cowling covering a front portion of the frame, a windshield disposed on and continuously blending into a central upper portion of the cowling, and a pair of air ducts extending along laterally opposite sides of the windshield and having an air inlet for introducing an air flow developed when the motorcycle is running into the cowling and an air outlet for discharging the air flow introduced from the air inlet in a substantially upward direction. The air inlet is positioned near a lower end of the windshield on each side of the cowling, and the air outlet is positioned at an upper end of the cowling.

Abstract: An attachment for the windshield of an automotive vehicle windshield operative by vibrations induced by airflow through a configured passage to divert flying insects away from the windshield as the vehicle travels forwardly. The attachment is in the form of a block-like body affixed as by adhesive to an upper, central, frontal part of the windshield. The body has upper and lower ends, the latter having an air inlet to a passage that exits at the upper end of the body. The passage is interiorly configured to generate the vibrations that are effective to divert the flying insects.

Abstract: A wind deflector for a snow plow on a motor vehicle that has a plow pump bar and a radiator. The deflector consists of a deflecting plate mounted to the pump bar so that when the plow is in position the deflecting plate will deflect air from above the plow down behind the plow and into the radiator of the motor vehicle to prevent overheating. In a modification an elongated funnel shaped deflecting housing is mounted to top of the plow in place of the deflecting plate.

Abstract: In an automobile rear body structure, a rear windshield glass is separated into two at a predetermined height. The upper half of the rear windshield glass is fixedly connected to a pair of rear pillars disposed on both sides of the rear body structure and to a roof panel to which a rear header extending in a direction widthwise of an automobile vehicle is rigidly secured for reinforcement of the roof panel. The lower half of the rear windshield glass is fixedly connected to a trunk lid, which is hingedly connected to the rear pillars for opening or closing a trunk room. Such a construction provides a relatively wide opening through which various luggages can be readily loaded in or unloaded from the trunk room.

Abstract: A deflector screen for mounting at the front of a vehicle includes an extruded mounting strip having a pair of flanges defining a vertical channel along the length of the strip for receiving a substantially rigid plastic screen. The screen is held within the channel by a shoulder on an inward face of the rear flange which cooperates with a groove formed along the length of the screen. A front face of the front flange carries a longitudinal slot to which can be attached a facing strip carrying a chromed surface. The base strip is of a mat black finish so that the facing strip can be applied or removed to provide different appearances. A rear mounting portion defined by a pair of horizontal flanges having a horizontal channel therebetween is formed on the mounting strip and includes transverse slots set at spaced locations along the length of the strip to allow bending of the strip at specific points.

Abstract: An air deflector for a power boat has an airfoil mounted along the top frame of the windshield with brackets so as to form a gap between the airfoil and the windshield. Forward motion of the boat produces a downward flow of air into the cockpit area. A clamp bar is mounted on the top surface of the airfoil and includes snap fasteners for attaching the forward edge of a canvas top.

Abstract: A rear-window wind deflector comprising a channel plate having a leading edge, a trailing edge, and a plurality of substantially parallel channels therebetween. The cross-section of each channel decreases smoothly from the leading edge to the trailing edge. Means are provided for mounting the channel plate directly on the rear window of a vehicle with the trailing edge over the window and the leading edge cantilevered over the vehicle body forward of the window. In a preferred emobdiment, the channel plate and the channels therein are crescent-shaped.

Abstract: An air deflector is used on a truck, there being one deflector for each side window. Each deflector has an oblong panel with means for mounting the deflector onto a front corner of the truck with an inner surface of the panel facing the truck and a longitudinal centre line of the panel being substantially parallel to a longitudinal centre line of said corner. The panel curves smoothly around said corner and the gap between the panel and the truck increases slightly from front to rear. The panel has a folded rear edge that is folded towards said truck. The panel is held in place by upper and lower brackets mounted between the deflector and the truck, the brackets continuously decreasing in width from front to rear of the deflector and being curved to correspond to the arcuate cross section of the panel. The deflector directs air beneath the side window nearest to it, thereby maintaining the cleanliness of the side window for a much longer period.

Abstract: An apparatus and process for reducing the aerodynamic drag on land transport vehicles are disclosed wherein a pair of vertical panels 34, 36 (FIG. 3) are disposed on the forward surface of a vehicle body 30 and facing the airstream encountered during vehicle movement. Panels 34, 36 (and similar panels as shown in FIGS. 4-6 and 9) are thin rigid flat plates and disposed in spaced relationship from each other and spaced from the vehicle sides. An additional thin panel 59 secured to and spanning the pair of vertical panels is employed in the embodiment illustrated in FIG. 5. Panel height and location, relative to the vehicle surface, influences the drag coefficient of the vehicle body. This drag reduction is accomplished due to the transition in the flow, consequent to the flow separation at the panels, leading to flow reattachment to the vehicle body surface near the front thereof, as illustrated in FIG. 8.

Abstract: A single piece bug and gravel shield which avoids use of an elongated channel extrusion bracket for mounting, with the shield being a single-piece, transparent polymeric material having an upper shield deflecting portion joined at a shoulder to a thicker lower base portion, with the shield being a transparent flexible polymeric plastic material and further having structure for attaching the base portion to the front edge of a vehicle to deflect air current up and over the vehicle.

Abstract: A wind deflector for use at the forward exterior of the side windows of a tractor or truck for diverting air currents away from the window and enabling the driver or passenger to travel in comfort with the window open comprises a transparent vertically elongated thick sheet or panel of plastic with the top and bottom ends bent in the same direction to form end flanges. A threaded stud extends outwardly through a reinforcing metal plate and the bent end flanges. Adjustably clamped along the projecting threaded stud is a clamp arm bracket, the outer end of which is provided with a tubular clamp which is adapted to encircle and clamp on a rear view mirror bracket arm or strut. The encircling portion of the bracket clamp is generally tangent to the clamp arm bracket. The bracket clamp may be adjusted radially along the stud, or inverted in order properly to engage the mirror arm or strut.

Abstract: A deflector shield for a motor vehicle is characterized by having a molded, wrap-around shield assembly along the horizontal and vertical side edges of the hood portion directly behind the grille which is secured in place by elongated flexible, shock mounting strips at spaced intervals along the horizontal edge and vertical sides of the hood portion, and a molded wrap-around cover plate in overlapping relation to the horizontal edge and opposite vertical side edges of the shield; and molded guard members are dispoed in overlying relation to a surrounding portion of the front grille of the vehicle together with front fender guard members which conform to and are disposed in overlying relation to the front fender and headlight portions of the vehicle.

Abstract: A protective shield assembly and method for mechanically fastening a protective shield to a frame includes a shield, a frame, a mechanical fastener, and an attachment mechanism. The frame includes a channel defined by a front wall, a rear wall, and bottom. The mechanical fastener is effected by a plurality of serrations which extend partially across the channel from one or both of the front and rear wall. The serrations allow the shield to be inserted into the channel and mechanically connect to the surface of the inserted shield in order to prevent extraction of the shield from the channel. The mechanical connection of the serrations to the surface of the shield is enhanced by crimping a wall of the channel in order to crimp the serrations into the surface of the shield and to create dimples in the frame which penetrate the surface of the shield farther than the serrations.

Abstract: A plurality of screen brackets are provided for attaching a bug screen or winter screen to a bug shield. Each screen bracket includes a first leg for mounting the screen bracket to the support leg of the bug shield and a second leg having a male snap thereon for receiving a corresponding female snap on the bug screen. The male snaps do not penetrate the shield member of the bug shield and therefore do not weaken or otherwise deface the bug shield.

Abstract: This disclosure concerns an Adjustable Motor Car Spoiler with a Third Brake Light. It is adaptable for mounting on cars of any width through the addition or removal of a number of extension inserts secured by rods to a central spoiler member. This gives it features of convenience and practicality.

Abstract: An apparatus for improving the aerodynamic performance of vehicles of a type having a windshield, a radiator for cooling engine coolant, a grille extending in front of the radiator for allowing air to enter the radiator and a hood extending from the top of the grille to the bottom of the windshield. A transparent airfoil extends from the front portion of the hood to the top of the windshield and from one side of the hood to the other side thereof.

Abstract: An air foil system for detachable adjustable mounting to the frame of a truck tractor rearwardly of the cab (or the sleeper compartment if there is one) for reducing air resistance encountered by a trailer towed by the truck tractor. The air foil system includes: (a) an upright support member including attachment means on its base which is adapted to detachably mount the support member to the tractor frame rearwardly of the cab, the support member having a transverse dimension approximately equal to the width of the cab; (b) an air foil adjustably mounted on top of the support member in a manner such that the air foil is adapted to extend above the cab; and (c) an adjustable side panel mounted on each end of the support member, each side panel extending downwardly from the top of the support member toward the base. Each side panel has a height greater than its width.