MULTI-STAGE PUMP Russian patent published in 2001 - IPC

FIELD: manufacture of pumps. SUBSTANCE: pump has housing with outlet passages and impeller with disk fitted on shaft. Pump stages are coaxially located on end faces of disk. Pump stage is made in form of rectangular projections in which curvilinear passage are provided. One side of each passage is located tangentially relative to circle of projection. Fixed stops located between projections are secured on inner walls of housing. EFFECT: possibility of building up high pressures; simplified construction. 3 cl, 2 dwg