US Patent 9545867 Ramp wall operating arrangement

A storage container for bulk materials includes a rectangular bin containing a an open-ended chamber having a horizontal bottom wall, a pair of vertical side walls and a vertical rear wall, and a pair of parallel spaced centrally-arranged horizontal guide rails that extend longitudinally below the bin, which guide rails have forward end portions that extend outwardly beyond the bin front end. A ramp wall is pivotally connected with the forward end of the bin for displacement between a vertical first position closing the forward end of the chamber, and a downwardly inclined ramp position. A piston and cylinder motor arrangement is connected between the guide rail ends and the ramp wall for displacing the ramp wall between its vertical first and downwardly inclined second positions. The chamber side walls are spaced so that a front end loader can travel up the downwardly inclined ramp and into the chamber.