The ornamental design for a pumphead, as shown and described.
FIG. 1 is a perspective view of the pump head of the present invention according to our design shown in the context of a fluid dispensing stem and a fluid containing bottle;
FIG. 2 is a perspective view of the pump head of the present invention according to our design shown in the context of a fluid dispensing stem;
FIG. 3 is a perspective view of the pump head of the present invention according to our design;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a side elevation view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
The broken lines showing in FIGS. 1, 2, 5, 6 and 8 are illustrative of environmental structure only and form no part of the claimed design.