Displacement pump

FIG. 1 is a first isometric view of the displacement pump;

FIG. 2 is a second isometric view of the displacement pump;

FIG. 3 is a third isometric view of the displacement pump;

FIG. 4 is a fourth isometric view of the displacement pump;

FIG. 5 is a first side elevational view of the displacement pump;

FIG. 6 is a second side elevational view of the displacement pump;

FIG. 7 is a third side elevational view of the displacement pump;

FIG. 8 is a fourth side elevational view of the displacement pump;

FIG. 9 is a top plan view of the displacement pump; and,

FIG. 10 is a bottom plan view of the displacement pump.

The broken lines in the Figures show portions of a displacement pump that form no part of the claimed design.