| 摘要 |
<p>The present invention provides a rotary actuator comprising a shaft, an arcuate piston rod centered on the shaft, a piston rod mounting stay extending between the shaft and the piston rod, a cylinder tube in the form of at least a segment of a toroid surrounding the piston rod, a plurality of partitions fixed within the cylinder tube and at least two of which slidably guide the piston rod, two pistons secured to the piston rod and slidable within the cylinder tube, each piston being arranged in between a respective pair of partitions to divide the space between said pair of partitions into two variable volume working chambers, and means for introducing pressure medium into the working chambers on the opposite sides of each piston to cause relative rotation between the shaft and the cylinder tube.</p> |
