Hollow Sleeper

FIG. 1 is a perspective view of a hollow sleeper according to my new design, as viewed from the top and looking from the left;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevation view thereof; and,

FIG. 7 is a rear elevation view thereof.

In the figures, the hollow sleeper is shown with a symbolic break in its length.

The appearance of any portion of the article between the break lines forms no part of the claimed design. The breaks in the drawings indicate, for ease of illustration, that the precise overall length of the hollow sleeper is not claimed.