Backpack Vacuum Cleaner

FIG. 1 is a perspective view of a first embodiment of a backpack vacuum cleaner showing the new design.

FIG. 2 is a front view thereof.

FIG. 3 is rear view thereof.

FIG. 4 is a left-side view thereof.

FIG. 5 is a right-side view thereof.

FIG. 6 is a top view thereof.

FIG. 7 is a bottom view thereof.

FIG. 8 is a perspective view of a second embodiment of a backpack vacuum cleaner showing the new design.

FIG. 9 is a front view thereof.

FIG. 10 is rear view thereof.

FIG. 11 is a left-side view thereof.

FIG. 12 is a right-side view thereof.

FIG. 13 is a top view thereof.

FIG. 14 is a bottom view thereof.

FIG. 15 is a perspective view of a third embodiment of a backpack vacuum cleaner showing the new design.

FIG. 16 is a front view thereof.

FIG. 17 is rear view thereof.

FIG. 18 is a left-side view thereof.

FIG. 19 is a right-side view thereof.

FIG. 20 is a top view thereof.

FIG. 21 is a bottom view thereof.

FIG. 22 is a perspective view of a fourth embodiment of a backpack vacuum cleaner showing the new design.

FIG. 23 is a front view thereof.

FIG. 24 is rear view thereof.

FIG. 25 is a left-side view thereof.

FIG. 26 is a right-side view thereof.

FIG. 27 is a top view thereof; and,

FIG. 28 is a bottom view thereof.

In these drawings, the broken lines illustrate portions of the backpack vacuum cleaner that form no part of the claimed design. The backpack vacuum cleaner is shown with a symbolic break in its height in FIGS. 22 - 26 . The distance between the claimed portions separated by the break lines and the appearance of any portion of the article not shown between the break lines form no part of the claimed design.