LIQUID-PACKED RING-TYPE MACHINE Russian patent published in 1998 - IPC

FIELD: manufacture of compressors and vacuum engineering. SUBSTANCE: blades of liquid-packed ring-type machine are bent in peripheral portion in opposite direction relative to sense of rotation forming angle between tangent lines to circle of wheel and line of bending of blade at point of their connection lying between 90 and 160 deg. EFFECT: enhanced efficiency. 2 cl, 4 dwg, 1 tbl