Connection device with resilient return

A combination of a device connecting a yoke and a caliper of a sliding caliper disk-brake, the combination comprising first and second housings of common axis formed respectively at the yoke and the caliper, a key inserted axially into the first housing with a relatively small clearance and into the second housing with a relatively large clearance, and the device comprising a retaining member for the key, the retaining member being a wire spring, the second housing and the key having at least partially the general form of cylinders with non-circular bases, the second housing and key having respective minimal and maximal diameters, the diameters of the second housing being greater than the respective diameters of the key and the maximal diameter of the key being greater than the minimal diameter of the second housing, the retaining member resting on first and second attachment points at the key and yoke and exerting on the key a resilient torsional torque about said common axis, the resilient torsional torque tending to engage the maximal diameter of the key and the minimal diameter of the second housing.