FIG. 1 is a rear perspective view of a roll-over protection structure having diamond frame embodying our design and being depicted as part of a riding mower for environmental purposes, with the mower, the lower frame section, the hinge assembly, and all but one of the bends of the swingable upper frame section being shown in broken lines for illustrative purposes only and forming no part of the claimed design;
FIG. 2 is an enlarged rear perspective view of the roll-over protection structure shown in FIG. 1, with the mower being removed;
FIG. 3 is an enlarged front perspective view of the roll-over protection structure as shown in FIG. 2;
FIG. 4 is a rear elevation view of the roll-over protection structure as shown in FIGS. 2 and 3, but with the lower frame section, the hinge assembly, and most of the unclaimed portion of the upper frame section being removed so as to show principally just the bend, and with the front elevation view of the bend being a mirror image thereof;
FIG. 5 is a right side elevation view of the roll-over protection structure as shown in FIG. 4;
FIG. 6 is a left side elevation view of the roll-over protection structure as shown in FIGS. 4-5;
FIG. 7 is a top elevation view of the roll-over protection structure as shown in FIGS. 4-6; and,
FIG. 8 is a bottom elevation view of the roll-over protection structure as shown in FIGS. 4-7.
The broken lines are directed to environment and/or are for illustrative purposes only. None of the broken lines form part of the claimed design.