US D515101 S1
FIG. 1 is a front elevation view of a diaphragm pump showing our new design;
FIG. 2 is a rear elevation view thereof;
FIG. 3 is a right elevation view thereof;
FIG. 4 is a left elevation view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
The structural features depicted by means of broken lines in the drawing figures have been shown for illustrative purposes only and form no part of the claimed design.