Overhead Guard Extension

FIG. 1 is a top, front, left side perspective view showing a first embodiment of an overhead guard extension; FIG. 2 is bottom, rear, right side perspective view thereof; FIG. 3 is a right side elevation view thereof; FIG. 4 is a left side elevation view thereof; FIG. 5 is a bottom plan view thereof; FIG. 6 is a top plan view thereof; FIG. 7 is a front elevation view thereof; FIG. 8 is a rear elevation view thereof; FIG. 9 is a perspective view thereof, shown in condition of use; FIG. 10 is a top, front, left side perspective view showing a second embodiment of an overhead guard extension; FIG. 11 is a bottom, rear, left side perspective view thereof; FIG. 12 is a left side elevation view thereof; FIG. 13 is a right side elevation view thereof; FIG. 14 is a bottom plan view thereof; FIG. 15 is a top plan view thereof; FIG. 16 is a rear elevation view thereof; FIG. 17 is a front elevation view thereof; and, FIG. 18 is a perspective view thereof, shown in condition of use. The broken lines shown in the drawings depict portions of the overhead guard extension that form no part of the claimed design. The broken lines in FIGS. 9 and 18 depict environment and form no part of the claimed design.