Abstract: The fixed flange with an inner toothing and the mobile flange with an inner toothing cooperate with a double satellite mounted in a ball bearing forming inside a housing for a composite cam. A sufficient excentration is provided between the diameter of the toothings of the double satellite and the intermediate part concentrical to the toothings of the fixed and mobile flanges so as to allow the composite cam made of two symmetrical and identical parts normally separated from one another at their upper portion by a spring which is slightly under tension and at their lower portion by a finger rigidly connected to an intermediate circular part mounted in bearing in the mobile and fixed flanges.

Abstract: The device comprises at least one rod normally locked by notched rollers mounted on pins and cooperating with at least one V-shaped bearing plate having toothed ramps, and the vertical displacement of which is made by rotation of a cam driven by a set of studs rigid with a circular member, with control means being further provided to drive this circular member.

Abstract: The articulation mechanisms is made particularly of irreversible satellite mechanisms connected to one another by a connection bar. The connection bar has, on one of its portion, a member with toothings subjected to action of a spring which, when the connection bar is in position between two cams of the articulation mechanisms, causes a rotation of these cams and of the satellites related thereto for taking up the manufacturing and mounting clearances.

Abstract: A device for compensating for clearances between a satellite and toothings of flanges of a reducing mechanism provided for adjusting the position of a seat. The mechanism has a fixed flange and a mobile flange that are held against one another via a crimped ring and enclose an eccentrically mounted satellite that bears on a cam driven by a shaft. This shaft has a square section with a first conical portion, and with a cone that is disposed in a central opening of the fixed flange. A spring is disposed between the cone and a peg provided on the shaft. When a hard point is met upon cooperation of toothings of the fixed and mobile flanges with a double toothing of the satellite, a slight longitudinal offset movement of the shaft in either direction is produced, resulting via one of the first conical portion and the cone in a change in eccentration of the satellite, thereby providing for passage of the hard point.