Abstract: A system for moving large quantities of pulverulent material from receiving hoppers, such as those of a fly ash precipitator, into a pressurized air conveyor pipeline. Separate auger conveyors move material from a first line of receiving hoppers and from a second line of receiving hoppers into gravity material inlets at opposite ends of an effectively airtight casing of a pressure mechanical conveyor wherein auger conveyor screws of opposite hand move it toward a central outlet through which it drops into the pressurized air conveyor pipeline. The auger conveyors and the pressure conveyor augers operate continuously; and the system is cycled to alternately feed material into the pressure conveyor casing at receiving hopper pressure, which is about atmospheric pressure, and out of the pressure conveyor casing at pipeline pressure. The cycles of two or more pressure conveyors are out of phase with one another so they feed material into the pipeline consecutively to provide level pipeline flow.

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: An injector with a pair of counter-rotating screws that are mounted along parallel axes in cylindrical chambers formed in a housing are driven in synchronism by a driver. A series of plates are slidably received in a track provided in the housing and are fitted between successive flights of the screws. The plates are carried by the screws in an endless path within the housing. Pockets formed by the plates, screw flights and chamber walls carry particulate solids from an inlet port to a discharge port of the housing for injection into a pressurized hydraulic transport line.

Abstract: A material-handling blower is associated with a conveyor duct, which has an open lower end. A horizontal conveyor screw has an inner end associated with the lower end of said duct and is angularly movable about a main vertical axis extending near said inner end. At least two backing rollers are rotatable on vertical axes and connected to said conveyor screw to move in unison therewith about said main vertical axis and are engageable with the inside peripheral surface of a silo to back said conveyor screw. Horizontal carrying arms are connected to said conveyor screw to move in unison therewith about said main vertical axis and extend from said conveyor screw on opposite sides thereof substantially at right angles to the axis of said screw.

Abstract: A device for the delivery of bulk materials into the suction pipe of a pneumatic transport installation comprises a vertical pipe designed for charging the bulk material, and a closing element installed on its lower end and placing the charging pipe into communication with the suction pipe of the installation. The closing element comprises a cylindrical shell with a coaxially built in sleeve, the inside diameters of both the shell and the sleeve being approximately equal to the inside diameter of the charging pipe, and a helical band located in said shell. The pitch of the helical band is close to the diameter of the shell and its width at the end facing an under-band portion of the shell is equal to the radius of said shell. The band is connected to said sleeve which is kinematically linked with a reversible drive for joint rotation with it so that, when rotating in one direction, the helical band compacts the bulk material in the under-band portion of the shell until said portion is completely filled.

Abstract: Equipment for blowing insulation or the like into buildings or other areas is provided with a supply bin or hopper having a primary conveyor, such as a plurality of parallel screw conveyors, occupying substantially the entire area of the bottom of the bin and serving to supply the insulation to a feed conveyor for transfer to a discharge tube, the delivery conveyor in the discharge tube preferably also is in the form of a screw conveyor which advances the insulation to an air blowing source that discharges into the insulation flow path to blow the insulation through a distributing hose in a controlled manner for placement in a desired area, the operation of the primary conveyor, feed conveyor and delivery conveyor as well as the operation of the air blower are responsive to a separate controller being remotely locatable with respect to the hopper so that a single operator may vary the supply of insulation material and air as required simultaneously with manipulating the distributing hose to assure proper plac

Abstract: Apparatus for feeding finely powdered material from a silo to a device illustratively a burner, in which the material in the silo is fluidized and extracted through a proportioning device, such as a screw or a distributor having alveoles. The material from the proportioning device, which is discharged intermittently, is supplied to a regulating tunnel where it is further fluidized and then discharged to the downstream side of a venturi whose upstream side is supplied with pressurized air. The fluidizing air in the silo and the regulating tunnel are preferably at the same pressure.

Abstract: A mobile bulk material unloader for a bulk carrier or general cargo ship including a mechanical elevator associated with a pneumatic system which can be suspended from a derrick and lowered into the hold of a bulk carrier such that the inlet means is in connection with the material to be transported. The combining of a mechanical elevator and a pneumatic system have resulted in a compact, portable unloader which substantially reduces the quantity of dust produced during transportation and which avoids the necessity of providing special bases in the holds of bulk carriers or the provision of expensive and complex bulk unloading structures located on the quay.