| 摘要 |
A device for tensioning a screw bolt wherein the device comprises a lifting cylinder having a piston and arranged on a support ring and means responsive to the piston for engaging the screw bolt in a positive locking manner including: a first member engaged by the piston; a second member hinged to the first member; and guide surfaces for pressing the second member against an engagement surface of the screw bolt in a positive engaging and self-locking manner. |
