FIG. 1 is a front elevation view of a first embodiment of a turbo fan;
FIG. 2 is a rear elevation view thereof
FIG. 3 is a right elevation view thereof;
FIG. 4 is a left elevation view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a front perspective view thereof;
FIG. 8 is a rear perspective view thereof;
FIG. 9 is a front elevation view of a second embodiment of a turbo fan;
FIG. 10 is a rear elevation view thereof;
FIG. 11 is a right elevation view thereof;
FIG. 12 is a left elevation view thereof;
FIG. 13 is a top plan view thereof;
FIG. 14 is a bottom plan view thereof;
FIG. 15 is a front perspective view thereof;
FIG. 16 is a rear perspective view thereof;
FIG. 17 is a front elevation view of a third embodiment of a turbo fan;
FIG. 18 is a rear elevation view thereof;
FIG. 19 is a right elevation view thereof;
FIG. 20 is a left elevation view thereof;
FIG. 21 is a top plan view thereof;
FIG. 22 is a bottom plan view thereof;
FIG. 23 is a front perspective view thereof; and,
FIG. 24 is a rear perspective view thereof.
The broken lines in the FIGURES show portions of the turbo fan which form no part of the claimed design.