US Patent 7621541 Swiveling and pivoting chassis for skates

An articulating chassis for skates with accompanying boot comprises: a plurality of brackets, a first set of rollers and a second set of rollers, and at least one articulating member. The brackets have a first side and a second side. The first side affixes with the boot and the second side affixes with the rollers. The first set of rollers having a first side, a second side, and a rolling surface. The second set of rollers having a top side and a bottom side and a tread surface. The rolling surface of the first set of rollers has a width smaller than the tread surface of the second set of rollers.