PNEUMATIC SCREW PUMP Russian patent published in 1994 - IPC

FIELD: transportation of loose materials. SUBSTANCE: arranged in housing which is provided with loading and mixing chambers is endless screw which consists of shaft mounted on two bearing supports and provided with blades of the right-hand and left-hand twist. Vanes are mounted between blades. Mixing chamber is brought in communication with discharge port located on lateral surface of housing. Filter and ejector are located on different sides of drawing-off pipe line. Filter is mounted vertically in loading chamber. Ejector is connected to pipe line feeding the air to mixing chamber made in form of Archimedean spiral. Inner framework of filter is made in form of spring. EFFECT: enhanced efficiency. 3 cl, 3 dwg