Improvements in the construction of keys for nuts with automatic adaptation of key surfaces to nut heads of different dimensions (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in the construction of wrenches for nuts with automatic adaptation of the key surfaces to nut heads of different dimensions, the configuration of said heads being identical, and the nuts being of multiple external and internal edges, characterized because it consists of several ends of tube housed one within another coaxial direction and movable with respect to each other in axial direction with key surfaces for the nut heads, whose dimensions correspond to the dimensions of the various heads of the key, for which purpose the tube ends during the in this case, the use is automatically moved with respect to each other so that the tube end corresponding to the size of the respective nut head secures the nut head with its key surfaces. (Machine-translation by Google Translate, not legally binding)