Patent ID: 7681507

Claim:
A method of forming a discharge control system for a railway car having a pair of longitudinal discharge openings disposed along opposite sides of a center sill of the railway car comprising: forming a common linkage operable to be centered completely beneath the center sill of the railway car; forming a plurality of secondary linkages operable to rotate between generally parallel to the common linkage to generally perpendicular to the common linkage, with each secondary linkage having a first end operable to be rotatably engaged with the common linkage and a second end operable to be rotatably engaged with a door assembly pivotally hinged to one side of the center sill of the railway car; forming an operating assembly operable to be engaged with the common linkage and to move the common linkage longitudinally relative to the center sill; and forming brackets operable to be connected with the center sill of the railway car and to allow portions of the common linkage to move longitudinally within each bracket relative to a respective distance from the center sill.