Abstract: A tonneau cover system can include a cover sized and shaped to cover the truck cargo box and a spring clamp designed to secure the cover to the truck cargo box. The spring clamp can include a rod connected to the cover. The rod can have a rod axis. A clamp body can be rotatably and slidably mounted on the rod. The clamp body can include a pair of oppositely disposed catches spaced apart from the rod axis. The catches can extend in a catch length direction intersecting the rod axis at a first angle. A grasping tether can be attached to the clamp body for manually sliding the clamp body along the rod in a direction away from the cover. Due to the flexible nature of the grasping tether, potential interference of the clamp with cargo in the cargo box can be significantly reduced.

Abstract: A tonneau cover system can include a cover sized and shaped to cover the truck cargo box and a spring clamp designed to secure the cover to the truck cargo box. The spring clamp can include a rod connected to the cover. The rod can have a rod axis. A clamp body can be rotatably and slidably mounted on the rod. The clamp body can include a pair of oppositely disposed catches spaced apart from the rod axis. The catches can extend in a catch length direction intersecting the rod axis at a first angle. A grasping tether can be attached to the clamp body for manually sliding the clamp body along the rod in a direction away from the cover. Due to the flexible nature of the grasping tether, potential interference of the clamp with cargo in the cargo box can be significantly reduced.