Patent attributes
The invention relates to a removable mechanical tensioning system, tool, and a method of stretching a bolt or stud axially, the bolt being located in and attachable to an object via a nut. The system in accordance with the invention comprises an anti-rotation member; and a tensioner device. The anti-rotation member is attachable to both the tensioner device and bolt. The tensioner device is operatively attachable to the bolt via the anti-rotation member. The tensioner device comprises or is operatively coupled to a nut engaging assembly configured to automatically engage and tighten the nut, at a lower torque than the applied tool torque. Displacement of a part of the tensioner device with a holding force applied to the anti-rotation member causes axial stretch of the elongate member and actuation of the nut engaging assembly to bring about displacement of the nut in the transverse direction relative to the stretched elongate member.
