Impeller for a rotary pump

摘要: The invention relates to an impeller of a rotary pump having annular upper part defining central inlet opening, drive-adjacent disk-shaped lower part, and plurality blades secured between the parts. parts are separate which secure together. Each blade is integrally formed with either or part. Every other remaining has free edge, remote from base thereof, projection extends into recess opening in it not molded. After assembled together, spaces around projections filled injected plastic, thereby securing together ends blades. This structure molding process have advantages permitting arbitrarily curved facilitating manufacture minimum number operating steps.