(under the class definition) Roll which includes a sealed cavity filled with fluid under pressure or with hydrostatically incompressible fluid.
SEE OR SEARCH CLASS
15, Brushing, Scrubbing, and General Cleaning,
165, for a brush or broom which is collapsible for entrance through a narrow mouth of hollowware and expansible after entrance and subclass 213 for a rotary wiper or polisher of like nature.
152, Resilient Tires and Wheels, for inflatable wheel or tire structure.
295, Railway Wheels and Axles,
12, for a wheel under the class definition having a pneumatic device for supporting the wheel tread portion. 451, Abrading,
505, for a rotary cylindrical abrading tool with a flexible or yielding periphery tensioned by inflation.
