Exhaust stack

FIG. 1 is a perspective view of an exhaust stack according to a first embodiment of the invention;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a first cross-sectional view thereof, taken along line 9 - 9 in FIG. 3 ; and,

FIG. 10 is a second cross-sectional view thereof, taken along line 10 - 10 in FIG. 3 .

FIG. 11 is a perspective view of an exhaust stack according to a second embodiment of the invention;

FIG. 12 is a second perspective view thereof;

FIG. 13 is a front view thereof;

FIG. 14 is a rear view thereof;

FIG. 15 is a left view thereof;

FIG. 16 is a right view thereof;

FIG. 17 is a top view thereof;

FIG. 18 is a bottom view thereof;

FIG. 19 is a first cross-sectional view thereof, taken along line 19 - 19 in FIG. 13 ; and,

FIG. 20 is a second cross-sectional view thereof, taken along line 20 - 20 in FIG. 13 .

The broken lines in the figures illustrate portions of the exhaust stack that form no part of the claim.