Stair Stepper

FIG. 1 is a front elevational view of a stair stepper showing the new design in an unfolded state; FIG. 2 is a rear elevational view thereof; FIG. 3 is a left-side elevational view thereof; FIG. 4 is a right-side elevational view thereof; FIG. 5 is a top plan view thereof; FIG. 6 is a bottom plan view thereof; FIG. 7 is a first perspective view thereof; FIG. 8 is a second perspective view thereof; FIG. 9 is a perspective view of the stair stepper showing the new design in a half-folded state; FIG. 10 is an enlarged view of the encircled portion ‘ 10 ’ in FIG. 1 thereof; FIG. 11 is an enlarged view of the encircled portion ‘ 11 ’ in FIG. 2 thereof; FIG. 12 is an enlarged view of the encircled portion ‘ 12 ’ in FIG. 3 thereof; FIG. 13 is an enlarged view of the encircled portion ‘ 13 ’ in FIG. 4 thereof; FIG. 14 is an enlarged view of the encircled portion ‘ 14 ’ in FIG. 6 thereof; FIG. 15 is an enlarged view of the encircled portion ‘ 15 ’ in FIG. 7 thereof; and, FIG. 16 is an enlarged view of the encircled portion ‘ 16 ’ in FIG. 8 thereof. The short broken lines shown in FIGS. 1 - 10 and 12 - 16 of the drawings are for the purpose of illustrating portions of the article that form no part of the claimed design. The long broken lines shown in FIGS. 1 - 4 , 6 - 8 , and 10 - 16 of the drawings illustrate boundaries of enlargement that form no part of the claimed design.