Patent Application
20080129077
The present invention relates generally to fabric and frame enclosures and, more particularly, to tonneau covers for pick-up trucks. This invention is an improvement upon the invention disclosed in U.S. patent application Ser. No. 10/286,711, filed on Nov. 4, 2002, the specification of which is incorporated by reference herein. The invention of that prior patent application was embodied in the Torza Top tonneau cover product made and sold by Advantage Company of Elkhart, Ind.
In general, prior tonneau covers have been of two types: hard and soft. Soft covers have been essentially formed from a fabric cover mounted over a metal frame. The frame typically extends about the periphery of the pick-up truck bed. The fabric can be vinyl or cloth or other flexible material, usually one that is waterproof or water resistant. The fabric can be a single cut piece or multiple pieces sewn together. Multiple pieces can be less costly to produce that a single cut piece, but have occasionally had the disadvantage of seam leakage. Coatings or special assembly can be used to reduce seam leakage, but that can add to production costs and may wear off in time.
The frame in fabric tonneau covers has typically been formed from an aluminum extrusion or steel angle iron. Such extrusions are lighter in weight and not prone to rust as compared to angle iron, but may be more costly to produce. Extrusions are typically hollow or open core in nature. In either case, the frame is typically removably clamped or bolted to the side walls of the pick-up truck bed and the fabric is secured to the frame or to the side walls of the pick-up truck bed. Cross beams or bows extending over the open area of the pick-up truck bed, usually from side to side, are typically secured to the frame and serve to support the fabric over the pick-up truck bed. The bows can be mounted into the hollow or open areas of extrusions or connected to the angle iron by a flange or fastener arrangement. Such bow mountings can be permanent or removable depending on whether the tonneau frame is intended to be disassembled upon removal from the pick-up truck or stored in a fully assembled form.
In contrast, hard covers are typically formed with a metal, fiberglass or other rigid panel member or series of members that are often permanently connected to a peripheral frame. The frame and cover are them removably mounted to the side walls of the pick-up truck bed, frequently as a completed unit after initial assembly. In many cases, hard covers tend to be generally flat or slightly bowed across the opening of the pick-up truck bed, as compared with the somewhat more bowed appearance of soft covers. By comparison to soft covers, hard covers tend to be heavier in weight and take up more storage space when removed from the pick-up truck. This extra weight and/or the bulkier size of hard covers frequently requires at least two persons to remove and/or install the cover. By comparison, some soft covers can be removed or installed by a single person.
Hard cover and soft cover tonneau covers also differ in other features. Hard covers tend to be more waterproof and resistant of theft of pick-up truck bed contents. Hard covers tend to withstand greater loads from snow or items/persons placed on top of the tonneau cover. Hard covers are less prone to tearing and puncture damage in general than many soft covers. Hard covers are less prone to deformation at higher speeds of travel and, thus may provide some benefits to vehicle fuel efficiency in that regard as well as to overall product durability and longevity. On the other hand, hard covers do not typically have a “soft” look and feel, such as that resembling a convertible top automobile. Moreover, the lighter weight of soft covers can benefit overall vehicle fuel economy more in that way. Given the tremendous variety in hard and soft covers, it is hard to say that one or the other will normally be less expensive, but in general the price range of soft covers goes lower than hard covers. Accordingly, tonneau cover users may start out with a soft cover, but over time may desire to upgrade to a hard cover.
Accordingly, it is an object of the present invention to provide improved tonneau cover assemblies. More particularly, objectives of the present invention include providing soft cover tonneaus with many of the advantages of hard covers, but without some of the drawbacks of hard covers. For example, those objectives would include greater durability and theft protection, greater water resistance, better fuel economy from shape maintenance, and larger load endurance while keeping costs and overall weight low and maintaining a soft look and feel and ease of installation and removal. At the same time, it is an objective of the present invention to be able to provide these advantages both prospectively to new tonneau covers and ones already in use. Further, it is an objective of the present application to enable application of these advantages to other fabric and frame enclosures, just as tents, caravans, awnings, patio covers and the like.
These and other objects of the present invention are obtained by the provision of a tonneau cover assembly having a plurality of substantially rigid panels inserted between the fabric and the bows and then locked into place and/or supported by snap-fit elements connecting to the peripheral frame of the tonneau cover. The snap-fit elements can also serve to positively locate the bows with respect to the frame. The panels can be closely dimensioned with respect to the distance across the frame or spaced somewhat to accommodate insertion about frame hinges and/or close fitting fabric, bows and frames. Two sided adhesive tape can be used between the panels and the snap-fit elements and the bows to maintain panel placement in the event that the assembly is to be a permanent aspect of the tonneau cover. Panels can also be perforated for weight reduction and/or cost savings without significant loss of theft security. Panels can be padded for impact absorption without permanent deformation so as to maintain tonneau cover attractiveness despite significant wear and tear during use. Other objects, advantages and novel features of the present invention will become readily apparent to those skilled in the art from the following detailed description of preferred embodiments.
The present invention includes means for securing panels 30 in place between bows 26 and 28 and cover 24. Panels 30 are, for example, formed from lightweight, substantially rigid materials such as an aluminum and polypropylene laminate or a substantially rigid surface substrate such as a five laminate composite available from Flex-Form Technologies of Elkhart, Ind. The panels are designed to be sufficiently strong and rigid as to support whatever load is needed on the cover from snow or, if desired, any other weight placed on the cover during use expected. At the same time, the panels would preferably have some flexibility to facilitate insertion into the cover, as described below. Also, the panels should be of sufficient strength to resist puncture or breakage that would normally be involved in a trespasser attempting to break through the cover to steal objects in the pick-up truck bed. In preferred embodiments, the panels may also be formed to have a padded top surface or separate padding adjacent the top of the panel so as to absorb impacts to the cover without showing dents. Such padding can also be used if it is desired to provide greater insulation over the bed of the pick-up truck. For cost and/or weight savings, the panels may be perforated or formed as a web having relatively small openings therein.
Panels 30 are shaped so as to fit between the top surface of bows 26 and 28 and the bottom surface of cover 24 and extend as close as possible to the interior edges of peripheral frame 22. With the flexible materials usually used for covers 24, there may be sufficient “give” or slack between the cover and the bows and frame to fit panels 30 into place without changing the dimensions of the bows or frame, especially as the material of covers 24 can tend to stretch. In placing the panels into the tonneau cover, bows 26 and 28 can often be conveniently removed and then replaced so that panels 30 are, in effect, clamped between the bows and the covers 24. In preferred embodiments multiple panels 30 are used in a given tonneau cover, with at least one bow supporting each panel.
In other embodiments, panels 30 may need to be dimensioned slightly smaller than the width or length of the cover between the interior sides of frame 22, as, for example, where there is little slack in cover 24 and/or there is extra padding used between the panels and cover 24 and/or where hinges 29 need to be fit around and/or where the extrusion or angle iron used for peripheral frame 22 has a more inwardly extending lower ledge than its upper ledge. The specific dimensions of the panels will, however, be readily understood by those skilled in the art from the specific application of the panels. For example, where bows 26 and 28 have a given curvature, the panels will also preferably conform to that curvature so that the completed appearance of the tonneau cover is consistent, smooth and attractive. Conforming to the curvature also permits the panels to reduce cover deformation due to wind stresses, as found, for example, in high speed vehicle travel.
Once panels 30 are in place and bows 26 and 28 positioned under them, snap-fit elements 32 are preferably used to secure the arrangement and provide additional panel support. The configuration of elements 32 are, for example, dictated by the particular extrusions or angle iron used for peripheral frame 22. Typically, extrusions for frame 22 are hollow or open sided as shown by extrusion 34 in
Snap-fit elements 32 also preferably include a support ledge 48 on the upper portion for receiving an edge 50 of panel 30. As shown in
The present invention can be a temporary or permanent feature of the tonneau cover.
In those applications where the panels are to be a permanent feature of the tonneau cover, two sided tape or other adhesive can be applied to ledge 48 and the top surfaced of bows 26 and 28 so as to retain panels 30 to those members. Two sided tape, for example, does not totally preclude removal of a panel from the tonneau cover, as, for example, if some repair was needed, but does restrict inadvertent removal and reduce shifting due to vibrations common to vehicular use.
With the present invention, it has been found that the major benefits of a hard cover tonneau (security, durability, fuel economy, load support, for example) can be obtained with the look and feel of a soft cover tonneau, and yet at lower production costs, less weight, with easier installation and removal. Further, with the present invention certain effects of seam leakage in the cover can be reduced because of the intervention of the panel directing leakage to the sides. Although the present invention has been described above with respect specific and preferred embodiments, that was done by way of illustration and example only. It should be clearly understood that the spirit and scope of the present invention is limited only by the terms of the claims defined below.
