US Patent 7147265 Collapsible truck bed cover

A collapsible truck bed cover comprising a frame and an outer covering, wherein the frame comprises four primary support bars, four secondary support bars, and four cross bars. The primary support bars are pivotally connected to each other at a swinging pivot point. The secondary support bars are pivotally connected to the primary support bars. The two rear primary support bars are pivotally connected to the truck bed rails at two stationary pivot points. When the cover is fully collapsed, it fits underneath an existing tonneau cover.