FIG. 1 is a front, top and right side perspective view of a regulator showing a first embodiment of our new design;
FIG. 2 is a rear, bottom and left side perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a left side view thereof;
FIG. 8 is a right side view thereof;
FIG. 9 is a front, top and right side perspective view of a regulator showing a second embodiment of our new design;
FIG. 10 is a rear, bottom and left side perspective view of FIG. 9;
FIG. 11 is a front view of FIG. 9;
FIG. 12 is a rear view of FIG. 9;
FIG. 13 is a top plan view of FIG. 9;
FIG. 14 is a bottom plan view of FIG. 9;
FIG. 15 is a left side view of FIG. 9;
FIG. 16 is a right side view of FIG. 9;
FIG. 17 is a front, top and right side perspective view of a regulator showing a third embodiment of our new design;
FIG. 18 is a rear, bottom and left side perspective view of FIG. 17;
FIG. 19 is a front view of FIG. 17;
FIG. 20 is a rear view of FIG. 17;
FIG. 21 is a top plan view of FIG. 17;
FIG. 22 is a bottom plan view of FIG. 17;
FIG. 23 is a left side view of FIG. 17;
FIG. 24 is a right side view of FIG. 17;
FIG. 25 is a front, top and right side perspective view of a regulator showing a fourth embodiment of our new design;
FIG. 26 is a rear, bottom and left side perspective view of FIG. 25;
FIG. 27 is a front view of FIG. 25;
FIG. 28 is a rear view of FIG. 25;
FIG. 29 is a top plan view of FIG. 25;
FIG. 30 is a bottom plan view of FIG. 25;
FIG. 31 is a left side view of FIG. 25; and,
FIG. 32 is a right side view of FIG. 25.
The broken lines shown in the figures are included for the purpose of illustrating portions of the regulator and form no part of the claimed design.