| 摘要 |
<p>The invention discloses a wheel (1) in particular for a roller skate to be mounted on a transversal axis (13) via at least one roller (17,18) comprising an internal ring (19) integral with the said axis (13) and an external ring (20) integral with a rim (21) on which is fixed a resilient envelope or tyre (22), the said roller rings (19, 20) defining between them a concentric space (23), in which are arranged spherical balls (24). The invention is characterised in that the roller (17,18) comprises internal ventilating means comprising at least an external air inlet (25) linked with an excess pressure chamber (26) located behind the said roller (17, 18) and through which the captured air (A) passes before being expelled outside through the space (23) defined between the roller rings (19 and 20).</p> |
