The ornamental design for an armattachmentdevice for heavy bag, as shown and described.
FIG. 1 is a front perspective view of an arm attachment device for heavy bag, showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left elevation view thereof, the right elevation view thereof;
FIG. 5 is a top plan view thereof, the bottom plan view being an identical image thereof; and,
FIG. 6 is a perspective view of the arm attachment device for heavy bag, shown in use.
The dash-dash-dash evenly sized broken lines showing a heavy bag in FIG. 6 and the attached arms throughout the figures depict environmental subject matter that forms no part of the claimed design, while the remaining dash-dash-dash evenly sized broken lines shown in the drawings depict portions of the arm attachment device for heavy bag that form no part of the claimed design.
The dash-dot-dash lines in FIGS. 1-4 and 6 depict the boundaries of the claim within the encircling portion; and it is understood that the claim extends to these boundaries that form no part of the claimed design. The breaks in the encircling portion of FIG. 5 correspond to the boundaries seen in the other figures.