| 摘要 |
<p>A linear actuator (1) comprises first and second casing sections (2,3) which are slidable relative to one another. Inside the casing sections (2,3) there are provided first and second motors (6,16) each of which can drive a screw-threaded rod (4). If one of the motors becomes jammed, the other can drive the rod (4).</p> |
