Patent ID: 7229379

Claim:
An automatic transmission device, comprising: a rotational input element and a rotational output element; a first and a second toothed element that each mesh with a third toothed element; a first coupling means to selectively couple a first one of the rotational input and output elements with the first toothed elements; a second coupling means for selective coupling said first one of the rotational input and output elements with said second toothed element; a third coupling means to couple a second one of the two rotational input and output elements with the third toothed element a first and second stopping means to selectively immobilize the first and second toothed elements respectively; a first actuator for the first coupling means; and characterized by a second actuator having a first position in which the first coupling means is either in an engaged state or a disengaged state, and the second coupling means is disengaged, and a second position in which the first coupling means is disengaged and the second coupling means is in an engaged state, wherein in the second position, the second actuator exerts thrust on the first actuator in the direction of the disengagement of the first coupling means.