Star impeller
The star impeller is a component installed in side channel and liquid ring pumps such as the water ring pump which work on the positive displacement principle. See Figs. 1, 2, 3 Star impeller

Fig. 1 Star impeller: Star impeller for side channel pump

Fig. 2 Star impeller: Open star impeller for liquid ring pump

Fig. 3 Star impeller: Open star impeller for liquid ring pump (shown with shroud removed)
