| 摘要 |
A combined linear and rotary actuator has a shaft with a screw thread, a nut engaging the screw thread and engaging means movable between a first location where rotation of the turning mechanism produces substantially linear displacement of the shaft, and a second location where rotation of the turning mechanism produces substantially rotary displacement of the shaft. The linear actuator finds particular use on retractable marine propulsor such as used on submarines and the like.
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