Dumbbell rack

FIG. 1 is a top, front, left perspective view of a dumbbell rack showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left-side elevational view thereof;

FIG. 5 is a right-side elevational view thereof;

FIG. 6 is a top plan view of the dumbbell rack of FIG. 1 , shown enlarged for clarity of disclosure; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings of the dumbbell rack are for showing portions of the article and form no part of the claimed design.