Setting tool for screwing-in threaded rods

摘要

A setting tool for screwing a threaded rod into a receiving material includes a work driver formed by a sleeve-like member. A retainer part is secured within one end of the sleeve-like member for holding the threaded rod while it is inserted. The end of the threaded rod located in the retainer part bears against a piston positioned within the sleeve-like member. A hydraulic medium holds the piston against the end of the threaded rod so that the rod is held in the work driver. After a threaded rod has been set, the rod can be removed from the retainer part by relieving the pressure of the hydraulic medium acting on the piston. The pressure is built-up as the threaded rod is screwed into the receiving material. The pressure is released by opening a valve connected to the space in the sleeve-like member containing the piston and hydraulic medium.