Patent ID: 8550742

Claim:
An anti-unlock screw device for a connector configured to maintain the connection between two connection elements, the device comprising: a cylindrical sleeve mounted to be fixed in translation and free in rotation around a first of the connection elements, said sleeve comprising an internal thread at a front portion of the sleeve, the internal thread configured to cooperate with an external thread made on a second of the connection elements when the first connection element is engaged in the second connection element, and a row of saw-tooth notches arranged on an internal circumference of a rear portion of the sleeve, said saw-tooth notches extending radially towards an interior from an internal wall of the rear portion; and an internal ring mounted coaxially in the rear portion of the cylindrical sleeve and positioned between the cylindrical sleeve and the first connection element, the internal ring comprising at least one catch configured to cooperate with the saw-tooth notches on the rear portion of the cylindrical sleeve, and a blocking device configured to block by friction and configured to cooperate with a friction wall and a circular spacer, the friction wall and the circular spacer both configured to be fixed relative to the first connection element to keep said internal ring fixed in rotation relative to the cylindrical sleeve in a first direction of rotation so that the internal ring rotates at the same time as the first connection element, and, inversely, configured to keep said internal ring free in rotation relative to the cylindrical sleeve in a second direction of rotation opposite the first direction of rotation to permit the at least one catch to engage into the saw-tooth notches of the cylindrical sleeve, the blocking device comprising an elastic return means, and a bead positioned in a through housing formed in the thickness of the internal ring, the bead being free in rotation in the through housing, the through housing having a narrowed feature configured to block the bead, in rotation, in the second direction of rotation when the bead is pushed towards the narrowed feature, the bead rubbing against the friction wall and the circular spacer.