The ornamental design for a set of rollerskates powered by pump action, as shown and described.
FIG. 1 is a perspective view of a set of roller skates powered by pump action showing my new design;
FIG. 2 is a front view of the set of roller skates powered by pump action;
FIG. 3 is a top view of the set of roller skates powered by pump action;
FIG. 4 is a left side view of the left roller skate powered by pump action;
FIG. 5 is a right side view of the left roller skate powered by pump action;
FIG. 6 is a bottom view of the set of roller skates powered by pump action;
FIG. 7 is a rear view of the set of roller skates powered by pump action;
FIG. 8 is a cut-away side view of the left roller skate powered by pump action as indicated in FIG. 3; and,
FIG. 9 is a left side view of the left roller skate powered by pump action as attached to the shoe of a user.
Right side views of the right roller skate powered by pump action not shown are mirror images of left side views of the left roller skate powered by pump action. Hatch marks shown in FIG. 8 indicate subject matter not visible from the exterior of the left roller skate powered by pump action. Broken lines in FIG. 9 indicate environmental matter that form no part of the design sought to be patented.