Patent ID: 7134724

Claim:
A device for adjusting an angular position of an articulated back with respect to a sitting surface of a seat according to at least two predetermined sequences, the device comprising: a first toothed quadrant adapted to be connected to the sitting surface; a second toothed quadrant which is adapted to be connected to the back and is meshed into the first toothed quadrant adapted to be connected to the sitting surface, in a locked configuration of the seat, and is demeshed from the first toothed quadrant adapted to be connected to the sitting surface, in an unlocked configuration of the seat, to adjust the angular position of the back with respect to the sitting surface; an element which possesses a stepped quadrant having a first convex surface and at least one second convex surface, each defining an angular sequence, which are connected to one another by at least one stop surface; a pawl possessing a tooth capable of following each convex surface until it comes to bear against the at least one stop surface; and means for pivoting the pawl to release the tooth from the at least one stop surface, so as to cause the seat to change from one angular sequence to the next sequence.