Impeller

FIG. 1 is a perspective view of an impeller according to a first embodiment of our design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a right view thereof;

FIG. 8 is a left view thereof;

FIG. 9 is a perspective view of an impeller according to a second embodiment of our design;

FIG. 10 is another perspective view thereof;

FIG. 11 is a top view thereof;

FIG. 12 is a bottom view thereof;

FIG. 13 is a front view thereof;

FIG. 14 is a rear view thereof;

FIG. 15 is a right view thereof; and,

FIG. 16 is a left view thereof.

Where included, broken lines showing environment or structure are for illustrative purposes only and form no part of the claimed design.