Container elevating and dumping mechanism for self-loading vehicle

Claim 1

IN COMBINATION WITH A TRUCK BODY HAVING AN ELEVATED ACCESS OPENING, CONTAINER LIFTING AND EMPTYING APPARATUS COMPRISING A PAIR OF SPACED TRACKS EACH HAVING AN INNER RAIL AND AN OUTER RAIL IN SIDE-BY-SIDE ALIGNMENT ALONG THE DIRECTION BETWEEN SAID TRACKS, ALL OF SAID RAILS EXTENDING UPWARDLY FOR A MAJOR PORTION OF THEIR LENGTH IN SUBSTANTIALLY THE SAME PLANE EXTERIORLY ADJACENT A WALL OF SAID BODY, SAID INNER RAILS HAVING UPPER TERMINATING PORTIONS WHICH CURVE INTERIORLY OF SAID BODY ADJACENT SAID ACCESS OPENING AND BEING SUBSTANTIALLY STRAIGHT BELOW SAID TERMINATING PORTIONS, SAID OUTER RAILS BEING SUBSTANTIALLY STRAIGHT AND HAVING UPPER TERMINATING PORTIONS EXTENDING UPWARDLY BEYOND SAID INNER RAILS, AN ELEVATOR HAVING A PAIR OF UPPER FOLLOWERS ENGAGING SAID INNER RAILS, RESPECTTIVELY, AND A PAIR OF LOWER FOLLOWERS ENGAGING SAID OUTER RAILS, RESPECTIVELY, MEANS FOR MOVING SAID ELEVATOR ALONG SAID TRACKS, AND MEANS ON SAID ELEVATOR FOR SUPPORTING A CONTAINER EXTERIORLY ADJACENT SAID BODY WALL AND HOLDING SAID CONTAINER DURING MOVEMENT OF SAID ELEVATOR BETWEEN A LOWER POSITION, AT WHICH SAID CONTAINER IS UP-