US Patent 9409608 Pickup box extender with access doors

The disclosure describes a box extender for a pickup truck that has a box with a bed and a tailgate, where the tailgate extends the bed's length in a longitudinal direction when open. The box extender may have access doors. First and second side walls may be mounted to the box to pivot between a forward, stowed position along opposite walls of the box and a rearward, extended position above the tailgate. An end wall may be disposed above the tailgate between the first and second side walls and may include a first section that is hinged to the first side wall and a second section that is hinged to the second side wall. The side walls and the end wall may enclose a volume above the tailgate for cargo storage. The first and second sections of the end wall may be opened to access the box.