Three-wheel Walker

FIG. 1 is a front, left and bottom perspective view of a three-wheel walker showing my new design; FIG. 2 is a rear, right and top perspective view thereof; FIG. 3 is a front view thereof; FIG. 4 is a rear view thereof; FIG. 5 is a left side view thereof; FIG. 6 is a right side view thereof; FIG. 7 is a top plan view thereof; FIG. 8 is a bottom plan view thereof; FIG. 9 is an enlarged view of area 9 in FIG. 1 ; FIG. 10 is an enlarged view of area 10 in FIG. 1 ; FIG. 11 is an enlarged view of area 11 in FIG. 2 ; and, FIG. 12 is an enlarged view of area 12 in FIG. 2 . The broken lines in the figures illustrate portions of the three-wheel walker that form no part of the claimed design. The dot-dash broken lines represent boundaries of the enlarged portions and form no part of the claimed design.