FIG. 1 is a front elevation view of an air cannon showing my new design;
FIG. 2 is a front view of the air cannon of FIG. 1;
FIG. 3 is a let side view of the air cannon of FIG. 1;
FIG. 4 is a right side view of the air cannon of FIG. 1;
FIG. 5 is a front end view of the air cannon of FIG. 1;
FIG. 6 is a back end view of the air cannon of FIG. 1;
FIG. 7 is a bottom end view of the air cannon of FIG. 1;
FIG. 8 is a front elevation view of an air cannon showing my new design;
FIG. 9 is a front view of the air cannon of FIG. 8;
FIG. 10 is a let side view of the air cannon of FIG. 8;
FIG. 11 is a right side view of the air cannon of FIG. 8;
FIG. 12 is a front end view of the air cannon of FIG. 8;
FIG. 13 is a back end view of the air cannon of FIG. 8; and,
FIG. 14 is a bottom end view of the air cannon of FIG. 8.
The broken lines are included for the purpose of illustrating non-claimed subject matter and form no part of the claimed design.