Extendable liner for pickup truck boxes

Claim 1

In a vehicle having a storage area with upstanding sides and open at one end, the improvement consisting of an extendable liner comprising: (a) a rigid liner having two upstanding, parallel, vertical sides and a floor extending between said sides, said liner being adapted to slide horizontally within said storage area; and (b) means for supporting and extending said liner from said open end of said storage area and supporting said liner in an extended position, said extending and supporting means comprising: (i) a first pair of roller tracks in parallel spaced relationship fixed relative to said storage area; (ii) a second pair of roller tracks fixed in parallel spaced relationship, each said second roller track being fixed to opposite outer vertical surfaces of said upstanding sides of said rigid liner; (iii) a pair of roller carriages having mounted thereon a plurality of rollers and adapted for rolling in said first and second roller tracks, each said roller carriage comprising a first vertical surface having mounted on the interior surface thereof a plurality of horizontally-spaced rollers adapted for rolling in said first roller tracks, and a second vertical surface vertically-spaced from said first vertical surface and having mounted thereon a plurality of rollers adapted for rolling in said second roller tracks.