Hard roll-up tonneau

What is this patent about?

’135 is related to the field of vehicle storage systems, specifically focusing on protective covers for pickup truck beds. Traditional solutions often force a compromise between the security of a rigid, hard-shell cover and the space-saving convenience of a soft, roll-up cover. The background context involves the need for a durable barrier that can support heavy loads while remaining easy to stow without requiring the bulky stacking or complete removal typical of segmented hard covers.

The underlying idea behind ’135 is the creation of a hybrid architecture that achieves a circular roll-up geometry using rigid structural elements. By utilizing a series of narrow, interlocking slats connected by discrete hinge points, the system allows a hard surface to behave like a flexible sheet. This insight enables the cover to maintain high structural integrity in its flat state while overcoming the geometric interference that usually prevents rigid panels from being rolled into a compact cylinder.

The claims of ’135 focus on a cover assembly comprising a plurality of rigid slats joined by separate, independent hinge members that connect adjacent pairs. These hinges are distinct components from the slats themselves, allowing for a specific range of motion where the slats can transition from a load-bearing planar configuration supported by side rails to a stowed, rolled configuration. Crucially, the design allows the slats to be stored in a roll that sits above the side rails at the front of the truck bed.

In practice, the invention utilizes interlocking extrusions or flexible living hinges to facilitate the rolling motion. One particularly effective implementation involves varying the width of the slats along the length of the cover; narrower slats are placed at the rear to allow for a tighter initial radius, while wider slats are used toward the front as the roll diameter naturally increases. This graduated sizing optimizes the stowed volume and reduces the total number of components required, making the system lighter and more cost-effective than a uniform slat design.

This approach differs from prior art by moving away from heavy bi-fold or tri-fold panels that obstruct the rear window or require significant effort to fold. Unlike soft vinyl covers that offer little protection against theft or heavy snow, this system provides a load-bearing surface capable of supporting items like lumber or equipment. By integrating the strength of aluminum slats with a rolling mechanism, the invention provides a high-security enclosure that does not sacrifice the utility of the truck's cargo space when the bed needs to be fully revealed.