Abstract:
A system and method for deflecting the wind which would otherwise impinge upon the tailgate of a pickup truck, the deflector being mounted externally of the truck bed to preserve cargo space, including a spoiler and including a retractable fabric for deflecting the wind.

Description:
RELATED APPLICATIONS 
     This application is related to and claims the priority of U.S. Provisional Patent Application Ser. No. 60/287,422 entitled “Tailgate Sail” filed May 1, 2001, the disclosure of which is incorporated herein by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     The present invention relates to a system and method for deflecting the wind which would otherwise impinge upon the tailgate of a pickup truck. 
     The adverse effects of wind on the forward facing surface of the tailgate of a pickup truck are well known and many have addressed the problem by providing a rearwardly and upwardly inclined surface deflecting the wind up and over the tailgate when the truck bed is not filled with cargo. Often, such deflectors are in combination with the definition of storage areas (see, e.g. the Canfield U.S. Pat. No. 4,451,075 and the Kuo U.S. Pat. No. 5,498,058), loading ramps (see, e.g. the Slater U.S. Pat. No. 4,884,838), etc. and thus require substantial modification of the truck bed and/or tailgate. Many of the single function devices also require modification of the truck bed and/or the tailgate of the pickup truck to store the deflector when not deployed (see, e.g. the Corner U.S. Pat. No. 5,435,616). 
     Others such as that disclosed in the Larsen U.S. Pat. No. 5,551,747 address the storage problem by providing a false floor which is hinged to the bed at the front end thereof so that the rear end thereof may be selectively raised and lowered. In addition to the requirement that the bed of the truck be modified, the presence of the deflector on the bed is problematical and an unsatisfactory gap is created between the raised end of the deflector and the tailgate. 
     Other known attempts to address the storage problem have constructed the deflector in two panels and telescoped one panel within the other panel so that the telescoped panels may be stored flat against the closed tailgate when not deployed. Examples of such deflectors are disclosed in the Benchoff U.S. Pat. No. 5,069,498 and the Mora, Sr. U.S. Pat. No. 5,735,567. These telescoping devices necessarily have substantial thickness inasmuch as the telescoped panel must have sufficient structural integrity to resist the substantial pressure of the relative wind generated by high speed driving, and the telescoping panel must overlie and structurally support the telescoped panel. Still additional thickness is required if the assembly includes laterally extendable panels to accommodate truck beds of different widths, and the construction of such complicated assemblies is generally expensive. 
     Attempts to address the storage problem without resorting to telescoping structures include the hinging of the two panels and the folding thereof against the closed tailgate. As disclosed, for example, in the Vallerand U.S. Pat. No. 5,722,714, the maintenance of the panels in the deployed position is accomplished by fastening the distal end of the forward panel to the truck bed. This requires modification of the truck bed and increases the difficulty in deploying and storing the deflector. Depressions in the truck bed accumulate dirt and debris which must be removed before the deflector can be stored. The storage of such devices may also interfere with the storage of a spare tire. 
     Still other systems such as disclosed in the Felker U.S. Pat. No. 5,743,589 avoid the necessity for attaching the distal end of the forward panel to the truck bed by making the panels sufficiently rigid and thick, and by the location of the hinges used to connect the panels that the abutting edges of the panels limit the rotation of the forward panel upwardly beyond the plane of the rear panel. The force of the relative wind is concentrated on the hinged junction, and, in general, such structures have proven unsatisfactory because of the thickness and strength of materials required to mechanically resist the force of the relative wind. Such structures do not address the gusting problem, apparently depending on the weight of the deflector to maintain the distal end of the lower panel in contact with the truck bed and thus add unwanted weight to the truck. 
     Accordingly, it is an object of the present invention to obviate many of the above problems in known systems and to provide a novel system and method for deflecting the relative wind from the closed tailgate of a pickup truck. 
     It is another object of the present invention to provide a novel wind deflector and method that permits the use of a thin, lightweight flexible membrane capable of resisting the relative wind and the gusts associated with the operation of the truck. 
     It is yet another object of the present invention to provide a novel wind deflector and method that requires minimum cargo space, requires no interfering modification of the truck bed and requires no modification of the tailgate. 
     It is still another object of the present invention to provide a novel wind deflector and method in which the deflector is stored externally of the bed of the truck so as to avoid negatively impacting the cargo carrying capacity of the truck. 
     It is a further object of the present invention to provide a novel wind deflector and method in which the angle of the deflector relative to the truck bed may easily be adjusted to accommodate different sized truck beds and the partial loading of cargo therein. 
     It is an additional object of the present invention to provide a novel wind deflector and method for integrating a spoiler into the deflector. 
     It is yet an additional object of the present invention to provide a novel stand-alone lightweight wind deflector which may be easily and quickly installed and removed from the tailgate of a pickup truck. 
     These and many other objects and advantages of the present invention will be readily apparent to one skilled in the art to which the invention pertains from a perusal of the claims, the appended drawings, and the following detailed description of the preferred embodiments. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is an elevation in cross-section illustrating one embodiment of a wind deflector of the present invention 
     FIG. 2 is a partial top plan view of the wind deflector of FIG. 1 deployed. 
    
    
     DESCRIPTION OF PREFERRED EMBODIMENTS 
     Referring to the Figures where like numerals represent like components, the deflector  10  is shown overlying the top of a closed tailgate  12 . The deflector  10  may be retained on the tailgate  12  in any suitable conventional way, preferably by frictional engagement of the arms  14 ,  16  with the tailgate  12  across the entire width thereof, and may be made of any suitable material such as a molded high impact plastic. It has been found desirable to extend the inner arm  16  substantially to the truck bed as shown in dashed lines in FIG.  1 . The additional height provided when the tailgate approximates the thickness of a truck bed liner and reduces the risk of interference with the unloading of cargo. This extension also provides the opportunity to insert a conventional fastener such as a self-tapping metal screw through the extension into the tailgate as a safety measure. 
     The deflector extends rearwardly from the tailgate  12  to form a spoiler for the air exiting the truck bed and then downwardly to form an elongated cavity or slot between the arms  18  and  14  that extends across the width of the tailgate  14 . A shaft  20  is journaled for rotation about the longitudinal axis thereof within the slot and is provided with suitable conventional means at one or both ends thereof for rotationally biasing the shaft. A suitable flexible material  22  such a sheet of high tensil strength plastic, desirably reinforced with glass or metal fibers, or a tightly woven fabric is fixedly attached to the shaft  20  and wound thereon by the rotational bias applied to the shaft. The free end of the material  20  may be provided with an enlarged stop to limit the rotation of the shaft and provide ready finger access to the material  22  so that it may be withdrawn from the slot against the rotational bias applied to the shaft. 
     The free end of the material  22  may be provided with any suitable conventional latching means  24  configured to mate with corresponding means  26  attached to the bed  28  of the pickup truck, desirably in a manner to minimize the collection of debris thereon. The bed may be provided with several sets of latches  26  so that the free end of the material  22  may be attached to the bed  28  at different distances from the tailgate  12 . The free end of the material is desirably provided with a suitable conventional stiffening member  30  so that the number of latches necessary to keep the entirety of the free end in proximity to the bed can be reduced and can be reached by a person standing on the ground beside the truck. 
     Of course, the shape of the material may be customized for the location of the wheel wells of a particular truck bed, and the lateral portions of the material may be folded inwardly to reduce the effective width of the material. Where the width of the material conforms to the distance between the wheel wells, additional side pieces may be removably secured to the material and the truck body, e.g., by snaps or buttons. 
     While preferred embodiments of the present invention have been described, it is to be understood that the embodiments described are illustrative only and that the scope of the invention is to be defined solely by the appended claims when accorded a full range of equivalence, many variations and modification naturally occurring to those of skill in the art from a perusal hereof.