Abstract: A gate apparatus comprising a first frame, a second frame and a plurality of rails, wherein each of the first and second frames comprises a vertical post and a plurality of cross-bars, and wherein the cross-bars of the first frame increase in length from the top cross-bar to the bottom cross-bar, and the difference in length between each cross-bar and the one below it is at least equal to the width of each rail, and wherein the cross-bars of the second frame increase in length from the bottom cross-bar to the top cross-bar, and the difference in length between each cross-bar and the one above it is at least equal to the width of each rail. The gate apparatus includes a means of attaching the rails to the cross-bars that allows the rails to pivot vertically. A wheel is attached to the vertical post of the second frame.

Abstract: A gate apparatus comprising a first frame, a second frame and a plurality of rails, wherein each of the first and second frames comprises a vertical post and a plurality of cross-bars, and wherein the cross-bars of the first frame increase in length from the top cross-bar to the bottom cross-bar, and the difference in length between each cross-bar and the one below it is at least equal to the width of each rail, and wherein the cross-bars of the second frame increase in length from the bottom cross-bar to the top cross-bar, and the difference in length between each cross-bar and the one above it is at least equal to the width of each rail. The gate apparatus includes a means of attaching the rails to the cross-bars that allows the rails to pivot vertically. A wheel is attached to the vertical post of the second frame.