FIG. 1 is a perspective view of an industrial vacuum cleaner embodying our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top plan view of a second embodiment thereof;

FIG. 8 is a front elevational view thereof;

FIG. 9 is a side elevational view thereof;

FIG. 10 is a rear elevational view thereof;

FIG. 11 is a bottom plan view thereof;

FIG. 12 is a perspective view of a third embodiment thereof;

FIG. 13 is a top plan view thereof;

FIG. 14 is a front elevational view thereof;

FIG. 15 is a side elevational view thereof;

FIG. 16 is a rear elevational view thereof;

FIG. 17 is a bottom plan view thereof;

FIG. 18 is a top plan view of a fourth embodiment thereof;

FIG. 19 is a front elevational view thereof;

FIG. 20 is a side elevational view thereof;

FIG. 21 is a rear elevational view thereof;

FIG. 22 is a bottom plan view thereof;

FIG. 23 is a top plan view of a fifth embodiment thereof;

FIG. 24 is a front elevational view thereof;

FIG. 25 is a side elevational view thereof;

FIG. 26 is a rear elevational view thereof;

FIG. 27 is a bottom plan view thereof.