Wheeled sporting equipment has frame, struts and wheeled units each consisting of wheel, axles, axle holders and foot rest

摘要

The piece of sporting equipment comprises a vertical framework with downward protruding appliances (2) joined by one or more struts (1) for fixing two wheeled units by means of pivot bearings. The pivot axles of the wheeled units are aligned vertically on an imaginary parallel or shared rotational plane. The frame extends above the wheels. A single wheel unit consists of three basic elements - a wheel (3) rotarily mounted on an axle; an axle holder (5,6); and a foot-rest (4)