Respirator

FIG. 1 is a front perspective view showing the new design for a respirator;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is an enlarged view of the encircled portion 7 of FIG. 3 .

The dash-dash broken lines in the drawings depict portions of the respirator that form no part of the claimed design. The dash-dot broken lines in FIGS. 3 and 7 represents the bounds of the enlargement taken from FIG. 3 and forms no part of the claimed design.