The ornamental design for an air hammer with quickchange chuck, as shown and described.
FIG. 1 is a front perspective view of the air hammer with quick change chuck according to a first embodiment of the present design.
FIG. 2 is a right side elevation view of the air hammer with quick change chuck as shown in FIG. 1;
FIG. 3 is a left side elevation view of the air hammer with quick change chuck as shown in FIG. 1;
FIG. 4 is a top side plan view of the air hammer with quick change chuck as shown in FIG. 1;
FIG. 5 is a bottom side plan view of the air hammer with quick change chuck as shown in FIG. 1;
FIG. 6 is a front elevation view of the air hammer with quick change chuck as shown in FIG. 1; and,
FIG. 7 is a rear elevation view of the air hammer with quick change chuck as shown in FIG. 1.
The broken lines in FIGS. 1, 2, 3, 6 and 7 setting forth the grip pattern on the handle are for illustrative purposes only and form no part of the claimed design.