FIG. 1 is a front perspective view of a pump showing our new design;

FIG. 2 is a front elevational view of the pump of FIG. 1;

FIG. 3 is a side elevational view of the pump of FIG. 1;

FIG. 4 is a rear elevational view of the pump of FIG. 1;

FIG. 5 is a second side elevational view of the pump of FIG. 1;

FIG. 6 is a top plan view of the pump of FIG. 1; and,

FIG. 7 is a bottom plan view of the pump of FIG. 1.

The broken lines shown in the drawing figures are for illustrative purposes only and form no part of the claimed design.