Patent ID: 8622671

Claim:
An anti-rotation device for preventing movement in an assembly including an endpiece provided with a thread screwed into a tube, the endpiece having at least one longitudinal groove extending parallel to a longitudinal axis of the thread of the endpiece, the tube including at least one anti-rotation lock element situated at its end for receiving the endpiece, the assembly further including a nut for being screwed on the endpiece, and the device comprising: a first washer having a first face provided with at least one anti-rotation lock component suitable for engaging with the anti-rotation lock element; a second washer having an inner periphery provided with at least one key for penetrating in the longitudinal groove; an outer periphery of one of the first or second washer having at least one outwardly projecting lug, and opposing faces of the first and second washers each including a series of complementary serrations for locking the first and second washers mutually against rotation and which complementary serrations permit step by step adjustment positions to be created between the first and second washers; and the device further comprising a third washer including at least one member for locking the nut against rotation, and wherein an outer periphery of the third washer includes at least one outwardly projecting tab adapted to co-operate and engage with the outwardly projection lug of the one of the first and first and second washers so as to thereby lock the third washer and the one of the first and second washers having the outwardly projecting lug against rotation.