| 摘要 |
This invention relates to a clutch apparatus provided with a driving pulley and a driven pulley in a pair and around which a belt is positioned and a movable tension pulley is disposed between the two pulleys. When power is transmitted, the tension pulley is advanced to impart the required tension to the belt for transmission of power and when power transmission is discontinued, the tension pulley is retracted to loosen the belt, which is forced out toward the outer side of driving and driven pulleys so that it is disengaged from the two pulleys due to its own elasticity.
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