Extruded Forward Section for Foldable Tonneau Cover Weight Distribution
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Solution Overview
Problem
Conventional foldable tonneau covers for pickup trucks face issues with water leakage and structural integrity due to the forward section not folding, which leads to uneven weight distribution and potential damage to polymeric foam materials when stacked.
Innovation Solution
A tonneau cover system with a forward section formed as an extruded panel, pivotably coupled to the cargo box, allowing the stack to be rotated upwardly, distributing weight evenly and eliminating separate frame components to prevent water leakage and reduce assembly costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the forward section is formed of a polymeric foam panel surrounded by a metal frame with separate frame elements, then the aesthetic appearance and structural support are improved, but the device complexity increases and water leakage risk increases due to multiple sealed joints
Solution Approach 1:
The patent merges the frame elements and polymeric foam panel into a single integrated extruded structure. The forward section is formed as one piece with the upper wall member, lower wall member, and internal ribs all extruded together, eliminating the need for separate frame elements and multiple assembly steps. This reduces device complexity while maintaining structural support through the integrated design.
Solution Approach 2:
The patent uses composite construction by combining the polymeric foam panel with metal frame elements in a multi-layer extruded structure. The upper wall member and lower wall member provide structural strength while the internal rib provides additional reinforcement, creating a composite structure that achieves high strength without requiring separate assembled components.
2Shape
If the forward section is formed of a polymeric foam panel surrounded by a metal frame with separate frame elements, then the aesthetic appearance is improved, but water leakage risk increases due to multiple sealed joints subject to forces when the truck travels over uneven roads
Solution Approach 1:
The patent merges the frame elements and polymeric foam panel into a single integrated extruded structure. By forming the forward section as one piece with continuous walls and no separate joints, the design eliminates the sealed joints that would otherwise be subject to forces from uneven roads. This single-piece construction maintains aesthetic appearance while ensuring water leakage resistance through the absence of vulnerable joint interfaces.
3Ease of manufacture
If the forward section is formed as an extruded panel with upper wall member, lower wall member, and internal rib, then the manufacturing cost is reduced by eliminating separate frame components, but the structural integrity must be maintained through the extruded design
Solution Approach 1:
The patent merges multiple components into a single extruded panel that is manufactured in one continuous process. The upper wall member, lower wall member, and internal rib are all formed simultaneously through extrusion, eliminating the need for separate manufacturing and assembly operations. This significantly reduces manufacturing cost while the integrated design ensures structural integrity through continuous material formation without weak joints.
Solution Approach 2:
The patent uses composite construction within the extruded panel, combining different material properties in the upper wall member, lower wall member, and internal rib. This composite extruded structure maintains structural integrity by strategically placing materials and geometric features during the extrusion process to provide necessary strength and stiffness throughout the forward section.
4Ease of operation
If the stack is rotated upwardly over the forward section, then the cargo box access is improved, but the weight distribution creates concentrated forces on the hinge member and rear frame element that can cause damage
Solution Approach 1:
The patent merges the forward section into a single integrated extruded panel that distributes rotational forces across its entire structure. When the stack is rotated upward, the forces are distributed through the upper wall member, lower wall member, and internal rib of the extruded section rather than being concentrated on a separate rear frame element. This integrated design reduces force concentration and potential damage while maintaining ease of operation for cargo box access.
Data Source
AI summary
Multiple rear sections can be pivotably coupled and foldable between a deployed arrangement in which a forward section and the rear sections are generally planar, and a storage arrangement in which the rear sections are folded into a stack. The forward section can be mounted to the cargo box and pivotably coupled to an adjacent rear section to support the stack in an upward angled position. The forward section can be formed of an extruded panel having an upper wall member and a lower wall member spaced apart from the upper wall member. The lower wall member can at least partially define a channel. An internal rib can extend between the upper wall member and the lower wall member.