". 2B is a perspective view of the wheelchair lock-down device as of FIG. 1 in the engaged (closed) position; FIG. 3A is a side view of the wheelchair lock-down device of FIG. 1 in the disengaged (open) position; FIG. 3B is a side view of the wheelchair lock-down device of FIG. 1 in the engaged (closed) position; FIG. 4 is a top view of the wheelchair lock-down device of FIG. 1." . . . .