| 摘要 |
<p>An apparatus for use in cyclically moving a member (24) along an arcuate path. Such member may, for example, be a pusher cylinder for moving glassware articles. The apparatus comprises a linearly movable piston (40) for linearly moving a convoluted shaft (180) attached thereto. The convoluted shaft (180) has surfaces thereon which act as tracks for roller bearings (350) mounted on a hub (182) which is disposed about the shaft. Linear motion of the shaft (180) is converted into rotary motion of the hub by the action of the bearings running on the convoluted sides of the linearly moving shaft. The member (24) is secured to the hub to turn therewith.</p> |
