FIG. 1 is a perspective view of a piston for pneumatic automotive lifting device showing a first embodiment my new design;
FIG. 2 is a front side elevational view of FIG. 1, the elevational view from the right, left, and rear being identical;
FIG. 3 is a top plan view of FIG. 1;
FIG. 4 is a bottom plan view of FIG. 1;
FIG. 5 is a perspective cross-sectional view taken along the line 5-5 in FIG. 1;
FIG. 6 is a perspective view a piston for pneumatic automotive lifting device showing a second embodiment of my new design;
FIG. 7 is a front side elevational view of FIG. 6, the elevational views from the right, left, and rear being identical;
FIG. 8 is a top plan view of FIG. 6;
FIG. 9 is a bottom plan view of FIG. 6;
FIG. 10 is a perspective cross-sectional view taken along the line 10-10 in FIG. 6;
FIG. 11 is a perspective view of a piston for pneumatic automotive lifting device showing a third embodiment of my new design;
FIG. 12 is a front side elevational view of FIG. 11, the elevational views from the right, left, and rear thereof being identical;
FIG. 13 is a top plan view of FIG. 12;
FIG. 14 is a bottom plan view of FIG. 12; and,
FIG. 15 is a perspective cross-sectional view taken along the line 15-15 in FIG. 11.