FIG. 1 is a perspective view of a vacuum cleaner base illustrating our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, with a left side elevational view being a mirror image thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a perspective view thereof in conjunction with a vacuum cleaner supported by the base.

The parts illustrated in dashed lines in FIGS. 1, 5, 6 and 7 form no part of the claimed design.