FIG. 1 is a top, front, left side perspective view of a top cap of a quick-change filter cartridge showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof, the rear being identical;

FIG. 4 is a left side elevational view thereof, the right side being identical;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a cross-sectional view thereof, taken on line 6--6 of FIG. 2; and

FIG. 7 is a cross-sectional view thereof, taken on line 7--7 of FIG. 2.