Patent ID: 8585120

Claim:
A tonneau cover system for a cargo box of a pickup truck, said tonneau cover system comprising: a plurality of tonneau sections each supporting a cover, said plurality of tonneau sections being positionable generally over the cargo box of the pickup truck, each of said plurality of tonneau sections being pivotally coupled to each other to permit pivotal movement of a first of said plurality of tonneau sections relative to a second of said plurality of tonneau sections between an opened position and a closed position; a side rail member connectable to a side wall of the cargo box; a keeper member downwardly extending from said first tonneau section, said keeper member being carried by said first tonneau section for pivotal movement therewith between said opened position and said closed position; a first keeper pin coupled with said side rail member, wherein said keeper member automatically engages said first keeper pin when said first tonneau section is pivoted into said closed position and automatically disengages said first keeper pin when said first tonneau section is pivoted into said open position; and a second keeper pin coupled with said side rail member, said second keeper being spaced apart from said first keeper pin such that said keeper member is received between said first keeper pin and said second keeper pin such that said first tonneau section is inhibited from longitudinal movement in a fore and aft direction along an X-axis.