| 摘要 |
The invention concerns a pneumatic control rotary actuator that incorporates a control piston of a rack toothing engaging with a pinion to cause it to rotate together with an item holder device; the pinion has toothing made up of several parallel pins ( 23 ) spaced at an angle, positioned and held orderly between a base flange ( 21 ) and an item holder disk head ( 22 ); the base flange and the disk are each produced by compression moulding, die-casting, sinterisation and the like, using a low mechanical resistance material whereas said pins are made of some other material with high mechanical properties and hardness.
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