Improved recessed element of retention. (Machine-translation by Google Translate, not legally binding)

摘要

Enhanced retaining recess element, characterized in that it is constituted by an element of revolution of uniform thickness, which has three radial tears that extend axially over a large part of its amplitude, to extend in the central confluence zone according to a conical cavity until reaching the other end of the element. (Machine-translation by Google Translate, not legally binding)