| 摘要 |
A platform for a small boat or the like is pivoted to the free end of a pair of arms which are pivoted at their opposite ends to a larger boat such as a yacht. The arms are controlled by an hydraulic jack and a second hydraulic jack is arranged to drive or be driven by the first jack to control the platform so that it is always horizontal for any position of the arms. The arms can position the platform below the water line for launching or receiving the small boat or well above the water line.
|
