Abstract: A rotary valve for controlling flow of pulverulent solids has diametrically opposed obturators carried on a rotary support and cooperating with respective valve ports in an internal circumferential surface of a cylindrical valve body, the obturators being movable radially and urged by springs against the internal surface of the valve body so as to make a good seal when the valve is closed, while permitting unobstructed flow of material when the valve is open.

Abstract: A load carrying device for an overhead conveyor, comprising a carriage for ovement along an overhead rail and a load-bearing container suspended from the carriage by two substantially parallel connecting elements pivoted at their upper ends to the carriage and at their lower ends to the load-bearing container to form a pivoted parallelogram linkage which permits the two connecting elements to swing when the carriage is accelerated or decelerated sharply while holding the load-bearing container upright; energy dissipation means, such as one or more friction bush or hydraulic shock absorber are also provided to damp the oscillation of the container and limit its movement in order to cushion the articles in the container against shock.