Hydraulic tensioning device for threaded bolt

摘要

PCT No. PCT/EP94/04072 Sec. 371 Date Aug. 2, 1996 Sec. 102(e) Date Aug. 2, 1996 PCT Filed Dec. 7, 1994 PCT Pub. No. WO95/15835 PCT Pub. Date Jun. 15, 1995A hydraulic tensioning device for a threaded bolt has a cylinder resting on a machine part to be clamped with a threaded bolt and a nut. It further has a threaded bushing threaded onto a free end of the threaded bolt. A piston is guided sealingly in the cylinder and rests on the threaded bushing. A safety catch is connected to the cylinder or the piston and engages either the nut or the threaded bushing.