Abstract: The anti-vibration suspension device includes at least three diagonal bars each articulated on the transmission box and on the structure by a rigid lever supporting a damping weight itself articulated to at least pivot on this structure, and, for each diagonal bar, a tension bar also articulated on the transmission box and on the structure, the corresponding lever being articulated to the structure being articulated to at least pivot on the lower end part of the corresponding tension bar, which is flexible in tension.

Abstract: The device comprises, between two blades and their members linking them to the hub, three levers articulated by ball joints to the members and to the hub, the two levers pivoting on the third one about axes of pivoting parallel to each other and perpendicular to the common plane passing through the centres of the ball joints. At least one of the levers comprises at least one drag damper.

Abstract: The device comprises, in addition to the conventional non-rotating plate and rotating plate of a swashplates device, a secondary rotating plate which can move in translation with the non-rotating plate but which cannot be inclined, and, for each blade, an articulated link with two levers which are articulated together and the first of which is articulated to the secondary rotating plate. The second lever is also articulated to the pitch rod controlling the corresponding pitch lever, and it is moreover articulated to a stationary point of the rotating plate. The inclinations of the plates give rise to angular manoeuvres of the levers of each link in order to actuate the pitch rod and control the pitch of the corresponding blade.