BELT TENSIONING SYSTEM, TENSIONER AND PARTS THEREFOR AND METHODS OF MAKING THE SAME

摘要

Belt tensioning systems, tensioners and parts therefor and methods of making the same are provided herein. One system includes a support unit and an endless transmission belt construction which is carried by the support unit and which is arranged to move in a certain path. An arm is pivotally mounted to the support unit and a pulley is rotatably carried by the arm and is in engagement with the belt construction. An actuator is carried by the support unit and has opposed ends. The actuator has a movable piston projecting out of one of the opposed ends thereof and is in engagement wi th the arm to pivot the arm in a direction to urge the pulley into the belt constructio n as the piston is extended outwardly from the one end of the actuator. The other of the opposed ends of the actuator is pivotally mounted to the support unit. In this way, the actuator pivots relative to the support unit as the piston thereof extends and retracts a t the one end thereof.