Abstract: A process and an apparatus for continuously conveying particulate material includes pressurizing a carrier fluid and admitting it at a predetermined flow rate and pressure to a path. A de Laval nozzle having a diffusing cone section accelerates the pressurized carrier fluid in a downstream portion of the path to a relatively higher flow rate and also expands the carrier fluid to a relatively lower pressure. A mixing chamber receives the reduced-pressure accelerated carrier fluid, and a feeder device supplies particulate material to the mixing chamber so that the high speed of the carrier fluid will entrain the particulate material in a region where the low pressure of the carrier fluid will cause the particulate material to be free of any agglomerations or lumps.

Abstract: An apparatus for clearing of land mines are disclosed. One or more rocket engines is mounted above the surface of an area to be cleared, and are then moved over this surface with their stream of exhaust gases directed downwardly towards the surface at a forward angle. The effect of the exhaust gas stream or streams is to exert a plowing action on the land, either detonating or dislodging any land mines that may be buried.

Abstract: A liquid-fueled rocket has a storage tank for the fuel components of a liquid fuel and the storage tank is able to communicate with the combustion chambers of the rocket via normally closed valves. The storage tank is enclosed and the fuel components only in part fill the latter. A body of gas is confined in the storage tank and has a pressure exceeding that in the combustion chambers. Thus, when the valves are opened, the fuel components are caused to flow from the storage tank to the combustion chambers by virtue of the difference between the pressure of the gas and the pressure in the combustion chambers.