Patent ID: 7712400

Claim:
Tensioning tool for an eccentric tensioning device of a power-transmission element drive, which includes a working eccentric loaded by a torsion spring, the working eccentric having a front region and a flange side a bearing journal supporting the working eccentric, and a running disk device encompassing the working eccentric, the tensioning tool comprising: a gripping device, an engagement structure comprising a protruding pin connected to the gripping device by an articulated connection having an axis that extends perpendicular to a direction of longitudinal extent of the pin such that the gripping device can pivot relative to the engagement structure about the axis, the protruding pin configured to be coupled so that it is locked in rotation with the working eccentric from said front region facing away from said flange side of the eccentric tensioning device, and a decoupling structure connected to the gripping device for implementing an axial displacement of the working eccentric relative to the bearing journal, the decoupling structure including a hook section having an opening facing the pin and adapted to engage the running disk, and a pressure spindle extending in a same direction as the pin and located on the decoupling structure.