# Patent

## Title
Wake convergence device for a pick-up truck

## Abstract

A wake convergence device for a pick-up truck is provided. The wake convergence device is spaced from the top of a pick-up truck and from the sides of the pick-up truck. The wake convergence device is moveably coupled to an aft end of the cab of the pick-up truck. When the truck is not in motion, the wake convergence device is positioned around the aft end of the pick-up truck. When the truck is in motion, the wake convergence device is moved upward and raised from the cab of the pick-up truck.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
The present application is a non-provisional of and claims priority to U.S. Patent Application Ser. No. 61/969,519, filed Mar. 24, 2014 and having the title “WAKE CONVERGENCE DEVICE FOR A PICK-UP TRUCK,” which is herein incorporated by reference in its entirety.


TECHNICAL FIELD OF THE DISCLOSED EMBODIMENTS
The embodiments herein generally relate to aerodynamics for vehicles and, more particularly, to a wake convergence device for a pick-up truck.
BACKGROUND OF THE DISCLOSED EMBODIMENTS
Over the years, the cost of rising fuel has become more and more of a concern. However, with the increase of fuel costs to over $100 per barrel of oil, the concern over fuel costs has never been greater. The significant rise in fuel costs coupled with the federal government's strategy of becoming less dependent on foreign oil has led to the automotive industry designing pick-up trucks for better fuel efficiency. A significant way of improving fuel economy on any vehicle is through improving the vehicle's aerodynamic efficiencies (mainly through aerodynamic drag reduction).
SUMMARY OF THE DISCLOSED EMBODIMENTS
In one embodiment, a wake convergence device for a pick-up truck is provided. The wake convergence device is spaced from the top of a pick-up truck and from the sides of the pick-up truck. The wake convergence device is moveably coupled to an aft end of the cab of the pick-up truck. When the truck is not in motion, the wake convergence device is positioned around the aft end of the pick-up truck. When the truck is in motion, the wake convergence device is moved upward and raised from the cab of the pick-up truck.
In one embodiment, a wake convergence device for a pick-up truck is provided. The wake convergence device includes a top panel spaced from a top of a cab of a pick-up truck. At least one side panel is spaced from a side of the cab. The wake convergence device is moveable between a stowed position and a deployed position. The top panel is spaced a first distance from the cab and the at least one side panel is spaced a second distance from the cab in the stowed position. The top panel is spaced a third distance from the cab and the at least one side panel is spaced a fourth distance from the cab in the deployed position.
In a further embodiment of the above, the third distance is greater than the first distance.
In a further embodiment of any of the above, the fourth distance is greater than the second distance.
In a further embodiment of any of the above, the wake convergence device is positioned at an aft end of the cab.
In a further embodiment of any of the above, when in the deployed position, at least a portion of the wake convergence device is positioned aft of an aft end of the cab.
In a further embodiment of any of the above, the top panel includes a leading edge and a trailing edge. The leading edge rotates at least one of up or down with respect to the top of the cab.
In a further embodiment of any of the above, the top panel includes a leading edge and a trailing edge. The trailing edge rotates at least one of up or down with respect to the top of the cab.
In a further embodiment of any of the above, the at least one side panel includes a leading edge and a trailing edge. The leading edge rotates at least one of in or out with respect to the side of the cab.
In a further embodiment of any of the above, the at least one side panel includes a leading edge and a trailing edge. The trailing edge rotates at least one of in or out with respect to the side of the cab.
In a further embodiment of any of the above, the wake convergence device moves to the deployed position when the pick-up truck reaches a pre-determined speed.
In one embodiment, a wake convergence device for a pick-up truck is provided. The wake convergence device includes at least one panel spaced from a cab of a pick-up truck. An actuating device couples the at least one panel to the cab. The actuating device moves the at least one panel between a stowed position and a deployed position. The at least one panel is spaced a first distance from the cab in the stowed position. The at least one panel is spaced a second distance from the cab in the deployed position.
In a further embodiment of any of the above, the second distance is greater than the first distance.
In a further embodiment of any of the above, the at least one panel is positioned at an aft end of the cab.
In a further embodiment of any of the above, when in the deployed position, at least a portion of the at least one panel is positioned aft of an aft end of the cab.
In a further embodiment of any of the above, the at least one panel includes a leading edge and a trailing edge. The leading edge rotates at least one of up or down with respect to the top of the cab.
In a further embodiment of any of the above, the at least one panel includes a leading edge and a trailing edge. The trailing edge rotates at least one of up or down with respect to the top of the cab.
In a further embodiment of any of the above, the at least one panel includes a leading edge and a trailing edge. The leading edge rotates at least one of in or out with respect to the side of the cab.
In a further embodiment of any of the above, the at least one panel includes a leading edge and a trailing edge. The trailing edge rotates at least one of in or out with respect to the side of the cab.
In a further embodiment of any of the above, the at least one panel moves to the deployed position when the pick-up truck reaches a pre-determined speed.
In a further embodiment of any of the above, the at least one panel is capable of breaking away from the actuating device.
Other embodiments are also disclosed.



BRIEF DESCRIPTION OF DRAWINGS
The embodiments described herein and other features, advantages and disclosures contained herein, and the manner of attaining them, will become apparent and the present disclosure will be better understood by reference to the following description of various exemplary embodiments of the present disclosure taken in conjunction with the accompanying drawing, wherein:
FIG. 1 illustrates a side perspective view of a pick-up truck having a wake convergence device positioned thereon.
FIG. 2 illustrates a rear perspective view of a pick-up truck having a wake convergence device positioned thereon.
FIG. 3 illustrates a rear perspective view of a pick-up truck having a wake convergence device positioned thereon.
FIG. 4A illustrates a side view of a pick-up truck having a wake convergence device positioned in a stowed position.
FIG. 4B illustrates an expanded side view of a pick-up truck having a wake convergence device positioned in a stowed position.
FIG. 4C illustrates a rear view of a pick-up truck having a wake convergence device positioned in a stowed position.
FIG. 4D illustrates an expanded rear view of a pick-up truck having a wake convergence device positioned in a stowed position.
FIG. 5A illustrates a rear view of a pick-up truck having a wake convergence device positioned in a deployed position.
FIG. 5B illustrates an expanded rear view of a pick-up truck having a wake convergence device positioned in a deployed position.



DETAILED DESCRIPTION OF THE DISCLOSED EMBODIMENTS
For the purposes of promoting an understanding of the principles of the present disclosure, reference will now be made to the embodiments illustrated in the drawings, and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of this disclosure is thereby intended.
As illustrated in FIGS. 1-5, a wake convergence device 100 is provided in accordance with an embodiment. The wake convergence device 100 is configured to be attached to the back end 102 of a pick-up truck cab 104, wherein the pick-up truck 105 includes a centerline 106 that bisects the front axle axis 108 and rear axle axis 110 of the pick-up truck 105 and lies within a vertical plane 112 and horizontal plane 114. The wake convergence device 100 1) directs streamline flow to the rear 107 of the pick-up truck 105 increasing the pressure in the low pressure wake behind the pick-up truck 105; 2) straightens the flow curvature on the sides 109 and top 111 of the pick-up truck 105 to reduce flow mixing and thereby reduce overall vehicle turbulence shedding; 3) reduces corner vortex shedding strength at the corners 116 of the pick-up truck cab's trailing edge 118; 4) reduces vehicle trailing edge spray; 5) reduces overall vehicle buffeting; and 6) reduces mechanical drag.
The wake convergence device 100 includes a top panel 120 and two side panels 122 (although the panels may be formed in multiple discrete sections or formed as a unitary structure). The top panel 120 includes a leading edge 124 (facing the front 113 of the pick-up truck 105) and a trailing edge 126 (facing the back 107 of the pick-up truck 105). In at least one embodiment, the top panel 120 measures approximately 2 to 6 inches from the leading edge 124 to the trailing edge 126. The top panel 120 has a length of approximately 56-64 inches from a first end 128 to a second end 130. The top panel 120 may be planar or have a rounded cross-section. The top panel 120 angles toward the horizontal plane 114 of the pick-up truck 105 from the leading edge 124 to the trailing edge 126 at an angle of approximately 11° to 15°. The side panels 122 include a leading edge 132 (facing the front 113 of the pick-up truck 105) and a trailing edge 134 (facing the back 115 of the pick-up truck 105). In at least one embodiment, the side panels 122 measure approximately 2 to 6 inches from the leading edge 132 to the trailing edge 134. The side panels 122 extend substantially from the top panel 120 to a top 119 of the pick-up truck bed 121 in some embodiments. The side panels 120 may be planar or have a rounded cross-section. The side panels 120 angle toward the vertical plane 112 of the pick-up truck 105 from the leading edge 132 to the trailing edge 134 at an angle of approximately 11° to 15°. The top panel 120 and side panels 122 may be joined to the cab 104 of the pick-up truck 105 with a moveable bracket 140 that enables the wake convergence device 100 to move from a stowed position 150, shown in FIGS. 4A-4D to a deployed position 152, shown in FIGS. 5A and 5B. In some embodiments, the wake convergence device 100 is moved manually by means of a lever accessible from inside the cab 104. In other embodiments, the wake convergence device 100 is moved by an appropriate motorized linkage. In the deployed position 150, the wake convergence device 100 is spaced from the top 142 of a pick-up truck cab 104 and from the sides 144 of the pick-up truck cab 104 by the moveable brackets 140. In one embodiment, the wake convergence device 100 is spaced approximately 1-3 inches from the pick-up truck cab 104.
In a stowed position 150, the wake convergence device 100 is stowed over the aft end 146 of the cab 104 of the pick-up truck 105. The cab 104 of the pickup truck 105 may have a recess into which the wake convergence device 100 is stowed in some embodiments. To improve the aerodynamics of the pick-up truck 105 when the pick-up truck 105 is moving, the wake convergence device 100 may be moved outward on the moveable brackets 140 to the deployed position 152. In the deployed positioned 152 the wake convergence 100 is raised from the cab 104 of the pick-up truck 105. In some embodiments, the wake convergence device 100 may be automatically moved outward on the moveable brackets 140 to the deployed position 152, such as under the control of an appropriate controller that determines from a speed sensor that the pick-up truck 105 is moving, whereby the controller actuates the motorized linkage of the moveable brackets 140 to move the wake convergence device 100 to the deployed position 152.
In at least one embodiment, the wake convergence device 100 also slides toward an aft end 107 of the pick-up truck 105 when moved to the deployed position 152. In such an embodiment, in the deployed position 152, at least a portion of the wake convergence device 100 is positioned aft of the cab 104 of the pick-up truck 105. In at least one embodiment, the entire wake convergence device 100 is positioned aft of the cab 104 of the pick-up truck 105. In at least one embodiment, only the trailing edges 126 and 134 of the wake convergence device 100 are positioned aft of the cab 104 of the pick-up truck 105 and the leading edges 124 and 132 of the wake convergence device 100 are positioned over and to the sides of the aft end 146 of the cab 104 of the pick-up truck 105.
In at least one embodiment, the wake convergence device 100 is moved to the deployed position 152 when the pick-up truck 105 reaches a pre-determined speed. In at least one embodiment, the wake convergence device 100 is moved through intermediate positions as the pick-up truck 105 increases speed. For example, at a first speed, the wake convergence device 100 may be moved into a first deployed position; and, at a second speed, the wake convergence device 100 may be moved into a second deployed position. In at least one embodiment, the top panel 120 and the side panels 122 of the wake convergence device 100 are separate panels. In such an embodiment, each panel 120 and 122 may be moved to a different deployed position 152. The deployed position 152 of the wake convergence device 100 as a whole or each separate panel 120 and 122 of the wake convergence device 100 may depend on the speed of the pick-up 105, the speed of the wind, the direction of the wind, or other factors.
In at least one embodiment, the top panel 120 of the wake convergence device 100 may also be configured to rotate toward or away from the horizontal plane 114 of the pick-up truck 105. For example, an angle of the top panel 120 of the wake convergence device 100 with respect to the horizontal plane 114 of the pick-up truck 105 may be altered as the pick-up truck 105 reaches a pre-determined speed or gradually as the pick-up truck 105 increases speed. In at least one embodiment, the leading edge 124 of the top panel 120 may rotate up or down with respect to the top of the pick-up truck 105. In at least one embodiment, the trailing edge 126 of the top panel 120 may rotate up or down with respect to the top 111 of the pick-up truck 105.
In at least one embodiment, the side panels 122 of the wake convergence device 100 may also be configured to rotate toward or away from the vertical plane 112 of the pick-up truck 105. For example, an angle of each side panel 122 of the wake convergence device 100 with respect to the vertical plane 112 of the pick-up truck 105 may be altered as the pick-up truck 105 reaches a pre-determined speed or gradually as the pick-up truck 105 increases speed. In at least one embodiment, the leading edge 132 of each side panel 122 may rotate in or out with respect to the side of the pick-up truck 105. In at least one embodiment, the trailing edge 134 of the side panel 122 may rotate in or out with respect to the side 109 of the pick-up truck 105.
The height of the top panel 120 may be adjustable by utilizing different size moveable brackets 140. The distance of the side panels 122 from the side 109 of the pick-up truck 105 may also be adjustable by utilizing different size moveable brackets 140. Additionally, a “break-away” feature in the mounting of the panels 120 and 122 may be added to allow for the reduction of damage in case of collision with foreign objects such as tree branches etc. The break-away feature may include a frangible portion within the moveable brackets 140. When a panel 102 or 122 is subjected to force, the frangible portion breaks so that the panel 120 or 122 breaks away from the pick-up truck 105.
While the embodiments have been illustrated and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, it being understood that only certain embodiments have been shown and described and that all changes and modifications that come within the spirit of the embodiments are desired to be protected.

## Claims

1. A wake convergence device for a pick-up truck including a cab, the wake convergence device comprising:
a top panel operably coupled to the cab of the pick-up truck; and
at least one side panel operably coupled to the cab of the pick-up truck, wherein the wake convergence device is moveable between a stowed position and a deployed position, the top panel and the cab defining a first spacing therebetween in the stowed position, the at least one side panel and the cab defining a second spacing therebetween in the stowed position, and the top panel and the cab defining a third spacing therebetween in the deployed position, the at least one side panel and the cab defining a fourth spacing therebetween in the deployed position, wherein the first spacing is different than the third spacing and wherein the second spacing is different than the fourth spacing.

2. The device of claim 1, wherein the third spacing is greater than the first spacing.

3. The device of claim 1, wherein the fourth spacing is greater than the second spacing.

4. The device of claim 1, wherein the wake convergence device is positioned at an aft end of the cab.

5. The device of claim 1, wherein, in the deployed position, at least a portion of the wake convergence device is positioned aft of an aft end of the cab.

6. The device of claim 1, wherein the top panel includes a leading edge and a trailing edge, wherein the leading edge rotates at least one of up or down with respect to the top of the cab.

7. The device of claim 1, wherein the top panel includes a leading edge and a trailing edge, wherein the trailing edge rotates at least one of up or down with respect to the top of the cab.

8. The device of claim 1, wherein the at least one side panel includes a leading edge and a trailing edge, wherein the leading edge rotates at least one of in or out with respect to the side of the cab.

9. The device of claim 1, wherein the at least one side panel includes a leading edge and a trailing edge, wherein the trailing edge rotates at least one of in or out with respect to the side of the cab.

10. The device of claim 1, wherein the wake convergence device moves to the deployed position when the pick-up truck reaches a pre-determined speed.

11. A wake convergence device for a pick-up truck including a cab comprising:
at least one panel operably coupled to the cab of the pick-up truck; and
an actuating device coupling the at least one panel to the cab, the actuating device moving the at least one panel between a stowed position and a deployed position, the at least one panel and the cab defining a first spacing therebetween in the stowed position, and the at least one panel and the cab defining a second spacing therebetween in the deployed position, wherein the first spacing is different than the second spacing.

12. The device of claim 11, wherein the second spacing is greater than the first spacing.

13. The device of claim 11, wherein the at least one panel is positioned at an aft end of the cab.

14. The device of claim 11, wherein, in the deployed position, at least a portion of the at least one panel is positioned aft of an aft end of the cab.

15. The device of claim 11, wherein the at least one panel includes a leading edge and a trailing edge, wherein the leading edge rotates at least one of up or down with respect to a top of the cab.

16. The device of claim 11, wherein the at least one panel includes a leading edge and a trailing edge, wherein the trailing edge rotates at least one of up or down with respect to a top of the cab.

17. The device of claim 11, wherein the at least one panel includes a leading edge and a trailing edge, wherein the leading edge rotates at least one of in or out with respect to a side of the cab.

18. The device of claim 11, wherein the at least one panel includes a leading edge and a trailing edge, wherein the trailing edge rotates at least one of in or out with respect to a side of the cab.

19. The device of claim 11, wherein the at least one panel moves to the deployed position when the pick-up truck reaches a pre-determined speed.

20. The device of claim 11, wherein the at least one panel is capable of breaking away from the actuating device.