We claim the ornamental design for a head for a vacuum cleaner, as shown and described.
FIG. 1 is a front perspective view of a head for a vacuum cleaner showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left-side view thereof;
FIG. 5 is a right-side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a rear perspective view thereof;
FIG. 9 is a perspective view thereof showing the unclaimed bristles attached to the vacuum cleaner head;
FIG. 10 is a perspective view thereof showing the vacuum cleaner head in use; and,
FIG. 11 is a perspective view thereof showing the vacuum cleaner head in an extended position from the body of the vacuum cleaner.
The details shown in broken lines form no part of the claimed design. The dot-dash broken lines define boundaries of the claimed design and form no part thereof.