Abstract: An apparatus for pivoting and locking a door on the bottom of a rail hopper car includes a locking mechanism for locking the door when closed and a lever mechanism for pivoting the door between closed and open positions. The locking mechanism and lever mechanism are separate but are operated by a single sliding operating linkage on the bottom of the car.

Abstract: A railway hopper car having doors movable downwardly and outwardly to a dump position is provided with an improved locking arrangement that includes a cam lever actuated by means of a push-pull link extending outwardly under the side of the hopper. The link is pivotally connected to a camming lever having a hinged latch element connected thereto. The latch element and camming lever are locked in a relatively angular position. The link arrangement upon actuation moves the cam lever and link to a substantially linear configuration thereby disengaging the latching element from the keeper member provided on the door structure.