| 摘要 |
The mechanism has a central pinion, driven in rotation, to which toothed bars are geared. Each bar exterior end has a clamp for fixing to the wheel. - The toothed bars gear onto the central pinion at different levels, each level having two parallel and diametrically opposed toothed bars. Each toothed bar outside end is curved and has a clamp so the axis of displacement of the end is radial and parallel to the toothed bar. |
