For the conveyance of free-flowing materials, such as sawdust, shavings and wood chips, etc. The Vecoplan® push/pull rod dischargers comprise hydraulically operated push/pull rods that move reciprocally across the floor of the bunker. If an upstream extraction device is activated, a hydraulic system automatically initiates a slow backwards and forwards reciprocal movement of several adjacent push rods. During this process, the special profile of the carriers transports the bulk material into an extraction device located at the end (one side undercuts the bulk material in the direction of the end of the bunker, the other side conveys the bulk material in the direction of the extraction device). Material from the silo is dosed in the required amounts by the discharge conveyor, or the push/pull rods themselves.