Manual actuating device, especially for steering a motorcycle

Claim 1

A manual actuating device of a steering rod which controls at least a guiding wheel of a vehicle through two handles that are movable in rotation in a substantially vertical plane, each connected to one bar of a three bar set, a first bar of each of the three bar sets forming with each of the respective handles a lever hinged to the vehicle, a third bar of each set being integral with a connecting bar rotatable about its longitudinal axis, the longitudinal axis of the connecting bar being transverse to the longitudinal axis of the vehicle, the connecting bar being integral in rotation with a return arm which is pivotally connected to the steering rod wherein a second bar of one three bar set forms a first angle with the first bar and a second angle with the third bar, wherein one of the first and second angles is greater than 180° and wherein a second bar from a second three bar set forms a third angle with the first bar and a fourth angle with the third bar, wherein both the third and fourth angles are less than 180°.