Propeller fan

FIG. 1 is a front view of a propeller fan, showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The dash-dash broken line portions show unclaimed subject matter only and form no part of the claimed design. The dash-dot broken lines show borders to the claim and form no part of the claimed design.