Dumbbell

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

FIG. 2 is a rear, left and bottom perspective view thereof;

FIG. 3 is a front, right and top perspective view of a dumbbell in disassembled status;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof;

FIG. 8 is a top plan view thereof;

FIG. 9 is a bottom plan view thereof;

FIG. 10 is an enlarged view of portion 10 shown in FIG. 3 ; and,

FIG. 11 is an enlarged view of portion 11 shown in FIG. 3 .

The broken lines depict the boundaries of the enlargements that form no part of the claimed design.