Bi-directional Plunger

FIG. 1 is a top perspective view of a bi-directional plunger showing my new design; FIG. 2 is a top view thereof; FIG. 3 is a bottom view thereof; FIG. 4 is a front view thereof; FIG. 5 is a rear view thereof; FIG. 6 is a left side view thereof; FIG. 7 is a right side view thereof; FIG. 8 is a top perspective view of a second embodiment of a bi-directional plunger showing my new design; FIG. 9 is a top view thereof; FIG. 10 is a bottom view thereof; FIG. 11 is a front view thereof; FIG. 12 is a rear view thereof; FIG. 13 is a left side view thereof; and, FIG. 14 is a right side view thereof.