I claim the ornamental design of a bilge pump, as shown and described herein.
FIG. 1 is a perspective view of a bilge pump showing the present invention;
FIG. 2 is a front view of the bilge pump in FIG. 1 showing the present invention;
FIG. 3 is a back view of the bilge pump in FIG. 1 showing the present invention;
FIG. 4 is a side view of the bilge pump in FIG. 1 showing one side of the present invention;
FIG. 5 is a side view of the bilge pump in FIG. 1 showing the other side of the present invention;
FIG. 6 is a top view of the bilge pump in FIG. 1 showing the present invention; and,
FIG. 7 is a bottom view of the bilge pump in FIG. 1 showing the present invention.
The broken line showing of the bilge pump in FIGS. 1–4 and 6–7 is for the purpose of illustrating environmental structure and forms no part of the claimed design.