| 摘要 |
<p>A child"s toy consists of two parts, a tube part (2) for directing a stream of air and a light ball (8) which can be supported by the stream of air. The tube (2) has a mouthpiece (4) atone end and a cup (6) at the other. The cup (6) has a slightly more concave curvature than the convex curvature of the ball (8) creating an air space (16) between the cup (6) and the ball (8). A port (12) in the cup (6) connects the tube (2) to the air space (16) and biases the flow of air in one direction causing the ball (8) to spin when the ball (8) is offered to the cup (6) and a stream of air is blown down the tube (2). </p> |
