Vacuum cleaner

FIG. 1 is a front view of a vacuum cleaner showing the claimed design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a perspective front, top, right view thereof;

FIG. 8 is a perspective front, top, left view thereof;

FIG. 9 is a perspective rear, top, right view thereof; and

FIG. 10 is a perspective rear, top, left view thereof.

FIG. 11 is a front view of another example of a vacuum cleaner showing the claimed design;

FIG. 12 is a rear view thereof;

FIG. 13 is a top view thereof;

FIG. 14 is a bottom view thereof;

FIG. 15 is a left view thereof;

FIG. 16 is a right view thereof;

FIG. 17 is a perspective front, top, right view thereof;

FIG. 18 is a perspective front, top, left view thereof;

FIG. 19 is a perspective rear, top, right view thereof; and,

FIG. 20 is a perspective rear, top, left view thereof.

The broken lines in the drawings depict unclaimed subject matter that forms no part of the claimed design.