| 摘要 |
<p>The device (10) has first and second connecting rods (13, 14) in pivot connection with a frame according to axes (X3, X4). A third connecting rod (15) is in pivot connection with the first connecting rod according to a third axis (X6) and in pivot connection with fourth connecting rod (12) or the second connecting rod according to fourth axis (X7), where the device is configured such that the first connecting rod adopts distinct angular positions (theta1-theta3) in which two of the rods in pivot connection with each other generate a dead center in the device.</p> |
