Dumbbell

FIG. 1 is a first perspective view of a dumbbell showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is an exploded view of the dumbbell thereof;

FIG. 10 is an enlarged view of the selected portion 10 in FIG. 1 ;

FIG. 11 is an enlarged view of the selected portion 11 in FIG. 1 ; and,

FIG. 12 is an enlarged view of the selected portion 12 in FIG. 1 .

The broken lines shown in the drawings depict portions of the dumbbell that form no part of the claimed design.