Track mounted cover for pickup type truck

Claim 1

In combination with a pickup truck having a cab and an open top truck body, the truck body having upstanding opposed longitudinal side walls and an open rear end, a rigid cover structure including a horizontal top wall and a pair of vertical side walls integral with and depending from said top wall, each of said side walls having an inturned flange integral with the lower edge thereof, a track device slidably mounting said rigid cover structure on said truck body, said track device comprising a pair of elongate channel-shaped upper track members, means securing each upper track member to the inturned flange of one of the side walls of the cover structure, each upper track member corresponding in length to the length of the associated side wall of the cover structure, each upper track member including a web portion having side flanges integral therewith and depending therefrom, a pair of inturned terminal flanges integral with said side flanges and projecting inwardly towards each other, said web portions of each upper track member having a width corresponding to the width of an inturned flange on said vertical side walls, a pair of elongate lower track members, means securing each lower track member upon the upper edge portions of one of the side walls of the truck body, said lower track members corresponding in length to the length of the side walls of the truck body, each lower track member being of T-shaped crosssectional configuration including an upright portion and a horizontal transverse portion projecting outwardly from the upright portion, the internal flanges of each upper track uderlying the transverse portion of the associated lower track member, each upper track member slidably engaging a lower track member to permit fore and aft sliding movement of the rigid cover between a forward position and a completely disengaged position, said cover being disposed in engaging relation with the cab of the truck in the forward position, one of the inturned flanges on said side walls having an aperture therein disposed in registering relation with an aperture in one of said upper track members, an aperture in one of said lower track members disposed in registering relation with said last mentioned apertures in said upper track and inturned flange when said cover is in the forward position, and an elongate pin extending through said apertures in the inturned flange, upper track member and lower track member to interlock said upper track members against movement with respect to its associated loweR track member when the rigid cover is in its forward position.