The recessed integral cushion tire is provided with an enclosed hollow place or places. Such chambers may be formed by the combined tire and rim. This subclass includes chambers of large circumferential extent, and they may extend entirely around the tire.
(1) Note. See this class, subclasses 157, 320, 322, 327, and indented subclasses, 333.1, 338.1, 339.1, and 342.1.