| 摘要 |
A rotatable wheel support (10) particularly adapted to obtain infinite positions throughout 360° relative to the fixed vertical axis of rotation (BB) of said support. This is achieved by means of at least one spring-loaded return means, connected at one end (3) to the fixed support and at the other to an offset lock (P) on the nut (2) for fastening said support (10). A stabilizer device is provided to cause the wheel to rotate upon exertion of lateral stresses or thrusts of sufficient intensity to release the stabilization system. |
