Abstract: An earth and sand conveyor system comprising a hopper adapted to receive dumped earth and sand, a trough connected to the hopper, a screw conveyor rotatably mounted within the hopper and the trough, a consolidating pipe connected to the trough, a molding pipe connected to the consolidating pipe, a conveyor pipe connected to the molding pipe, a first nozzle formed in the wall of the molding pipe, a second nozzle formed in the wall of the conveyor pipe, an air compressor connected to the first and second nozzles, and a directional control valve disposed between the air compressor and the first and second nozzles for alternately supplying the compressed air to the first and second nozzles.

Abstract: Apparatus for pneumatically transporting powdery or granular materials from a material supply unit through a transport pipeline to a material receiver unit. A spherical secondary transport medium with an outside diameter slightly less than the inside diameter of the transport pipe is supplied one by one by a secondary transport medium supply device into the transport pipe so as to be located just behind the powdery or granular materials. Thus, the materials can be intermittently transported together with the spherical secondary transport medium through the transport pipeline at a relatively low speed.