Abstract: A tonneau cover system for a pickup truck cargo box comprising a tonneau cover sized and shaped for covering the cargo box. A side rail comprises a first clamping surface adapted to engage the first side of the downward flange. A rod has a rod axis and is mounted on the side rail. A clamp body is mounted on the rod and includes a clamp arm having a second clamping surface adapted to engage the second side of the side rail. A cam is included with one of the side rail and the clamp body. A cam follower engages with the cam. The cam follower is included with the other one of the side rail and the clamp body. Movement of the clamp body along the axis of the rod advances the cam follower along the cam to thereby move the first clamping surface toward the downward flange.

Abstract: A tonneau cover system for a pickup truck cargo box comprising a tonneau cover sized and shaped for covering the cargo box. A side rail comprises a first clamping surface adapted to engage the first side of the downward flange. A rod has a rod axis and is mounted on the side rail. A clamp body is mounted on the rod and includes a clamp arm having a second clamping surface adapted to engage the second side of the side rail. A cam is included with one of the side rail and the clamp body. A cam follower engages with the cam. The cam follower is included with the other one of the side rail and the clamp body. Movement of the clamp body along the axis of the rod advances the cam follower along the cam to thereby move the first clamping surface toward the downward flange.

Abstract: A tonneau cover system for a pickup truck cargo box comprising a tonneau cover sized and shaped for covering the cargo box. A side rail comprises a first clamping surface adapted to engage the first side of the downward flange. A rod has a rod axis and is mounted on the side rail. A clamp body is mounted on the rod and includes a clamp arm having a second clamping surface adapted to engage the second side of the side rail. A cam is included with one of the side rail and the clamp body. A cam follower engages with the cam. The cam follower is included with the other one of the side rail and the clamp body. Movement of the clamp body along the axis of the rod advances the cam follower along the cam to thereby move the first clamping surface toward the downward flange.

Abstract: A tonneau cover can include at least one pair of cooperating locking elements coupled thereto with the cooperating locking elements being positioned to engage and automatically lock with each other when rearward sections of the tonneau cover are folded onto the forward section and into a stack. Thus, the cooperating locking elements can operate to retain the sections together in the stack when locked with each other.

Abstract: A tonneau cover can include at least one pair of cooperating locking elements coupled thereto with the cooperating locking elements being positioned to engage and automatically lock with each other when rearward sections of the tonneau cover are folded onto the forward section and into a stack. Thus, the cooperating locking elements can operate to retain the sections together in the stack when locked with each other.

Abstract: A tonneau cover system for a pickup truck cargo box comprising a tonneau cover sized and shaped for covering the cargo box. A side rail comprises a first clamping surface adapted to engage the first side of the downward flange. A rod has a rod axis and is mounted on the side rail. A clamp body is mounted on the rod and includes a clamp arm having a second clamping surface adapted to engage the second side of the side rail. A cam is included with one of the side rail and the clamp body. A cam follower engages with the cam. The cam follower is included with the other one of the side rail and the clamp body. Movement of the clamp body along the axis of the rod advances the cam follower along the cam to thereby move the first clamping surface toward the downward flange.

Abstract: A cover includes multiple panels pivotally connected together and foldable between a stacked arrangement and a deployed arrangement. Side rails are attachable to opposite sides of the cargo box and include ledges. Storage extension guides intersects the ledges. The panels are supportable upon the ledges in the deployed arrangement to cover the cargo box. The stack is supportable upon the first and second ledges in an intermediate position adjacent the storage extension guides. The stack is movable along the guides between the intermediate position and a storage position in which the forward edge of the lowermost panel is oriented below the rear edge of the lowermost panel.