Abstract: The vehicle seat runner has a first runner element receiving a vehicle seat element, and a complementary runner element fastened to the vehicle. A first fin wall and a second fin wall that are mutually parallel and that are spaced apart from each other are connected together via a base wall. Each fin wall has an inside face, the inside faces of the two fin walls facing each other. The inside faces are connected to each other in an additional connection region situated under the base wall.

Abstract: Hinge mechanism comprising first and second frames connected together by an adjustment device comprising a first set of gear teeth integral with the first frame and a first mobile toothed element engaging with the first set of gear teeth A second toothed element, mounted mobile on the second frame, engages with an additional set of gear teeth integral with the first frame.

Abstract: A runner for a motor vehicle seat, said runner comprising firstly first and second rails mounted to slide relative to each other in a longitudinal direction, and secondly a locking mechanism including an additional latch mounted substantially to pivot on a main latch about a second pivot axis, the additional latch being interposed between the main latch and a control member so that, when the control member moves from the locking position to the unlocking position, firstly the additional catch is pivoted about the second pivot axis, and secondly the additional latch and the main latch are pivoted about the first pivot axis.

Abstract: A track assembly for a motor vehicle seat, the track assembly comprising a male track and a female track. An internal space extends longitudinally between the male track and the female track. The cross-section of the internal space varies along the longitudinal axis of the track assembly. A seat equipped with such a track assembly.