US Patent 10889250 Expandable cargo box assembly for a pickup truck

Provided is an expandable cargo box assembly for mounting on a side wall section of a cargo bed. The cargo box assembly comprises a base member for attaching the expandable cargo box assembly to the side wall section. The base member supports a folding floor assembly and forward and rearward collapsible walls at each end of the base member. The cargo box assembly also includes an inner wall plate attached to the forward and rearward collapsible walls opposite to the base member. The base member, the folding floor assembly, the forward and rearward collapsible walls and the inner wall plate collectively define an expandable enclosure that can be positioned in a stowed position when not in use, and is configured to expand to a deployed position to receive cargo.