| 摘要 |
<p>The device comprises a first elongate body (1, 19) provided with screw threads (2) extending along the body, and a second body coaxially rotatable relative to the first body, which second body (3, 8, 24, 25) has at two rolls (4) provided with cams (5) engaging with the screw threads in the first body. Upon rotation of the bodies in relation to each other one body is moved linearly relative to the other body. The first body in the region of the threads (2) also is provided with cogs (11), which run transversely to the threads and in one direction of movement and provided over substantially the entire length of the body. Each roll (4) includes cogs (12) running transversely to the cams (5) thereof and in the direction of movement, which cogs (12) correspond to the cogs of the first body and are provided over substantially the entire length of the roll (4). <IMAGE></p> |
