Abstract: A device for separating dust particles from an air stream, in particular for mine ventilation, comprising a centrifugal separator, a blower for conveying the air stream through the centrifugal separator, and a device connected in advance of the centrifugal separator in the air flow direction to spray or atomize water which is fed into the air stream entering the centrifugal separator, the centrifugal separator being formed from at least one impeller with substantially radial blades connected together at their outer ends by circumferentially extending walls, the distance of which from the axis increases in the air flow direction, passage apertures being provided to the housing at the positions of greatest diameter.

Abstract: A separator of particulate material from fluid or gas or fluid mixture systems comprising a separator housing having intake and discharge openings formed therein. The intake opening of the separator housing is in communication with the medium in which the particulate material is suspended. The discharge opening of the separator chamber is in communication with a cyclone type settling chamber. A by-pass line extends from the upper end of the settling chamber to the conduit which is supplying the medium to the separator housing. A plurality of closely spaced hollow discs are rotatably mounted within the separator housing and are rotated by means of an electric motor or the like. A fan apparatus is in communication with the interior of the separator housing and is adapted to draw the medium from the intake opening, thence through the space between the discs, then longitudinally through the center of the discs to a point of discharge.

Abstract: A device for the separation of gaseous mixtures into components of differing molecular mass. The device is designed according to the principle underlying a turbine or a turbomolecular pump. The device has a rotor that is equipped with discs made of magnetic material having blades at their periphery and is installed in a stationary casing having a gaseous mixture inlet and at least two gas outlets connected to a gas delivery tube, and to whose inside wall stator discs are attached between the rotor discs. The device further has voltage means. The gas delivery tube has controls connected thereto which keep the total pressure in the gaseous mixture below 10 Pa.

Abstract: A low velocity, low temperature, inertial particle separator is disclosed which imposes minimum resistance to the flow of gas through the apparatus. The separator includes a slowly revolving drum with radiating cups around which the gas must flow. Change of direction of the flowing gas as it flows around the cups causes the entrained particles to be collected by the cup-shape of the cups. A vacuum system is provided for inducing the collected particles to migrate to a central axially disposed collection system which draws the particles away by suction.

Abstract: A separator assembly for separating different density fluids, such as gas and liquid, which comprises three stages, i.e., an inducer stage, a mixed flow impeller stage, and a centrifugal separator stage. The assembly is usually associated with a pump or pumps for pumping the separated fluids from the assembly. The inducer stage comprises a screw means which, with the impeller stage, delivers fluid to be separated into the separator stage. The impeller stage imparts rotary motion to the fluid. The centrifugal separator stage is a centrifuge and comprises inner and outer cylindrical members which rotate in unison and wherein centrifugal force on the fluid separates the heavier and lighter components, which components flow from the separator stage to the associated pump or pumps.