| 摘要 |
A device for tightening screw joints, comprising a pressure fluid motor, an overload friction type slip clutch, a pressure fluid shut off valve and a release mechanism for initiating closing of said shut off valve at slipping of said overload clutch. The release mechanism comprises a female member associated with one of the slip clutch halves and a male member associated with the other of the slip clutch halves, and when aligned with said female member receivable thereinto. The release mechanism also comprises a guide means for urging against a biasing means said male member into alignment with said female member upon relative rotation of the slip clutch halves. |
