Abstract: A locking device is made of a casing having a substantially trapezoidal shape and a rod extending through the casing. The rod has a central portion and two side guides to permit the central portion to come into locking engagement with a toothed roller placed inside toothed triangular recesses of a V-shaped member. The V-shaped member has a top portion provided with a fork. One side of the V-shaped member is connected to an inner edge of the casing and the other side has a cutout with a lower rounded portion and an upper straight portion provided with a slope. The cutout cooperates with a cam comprising a flat portion and a finger.

Abstract: A rigid frame for use as framework in the back of a car seat is constituted by a shell which is itself built up by assembling together two half-shells (3) of stamped sheet metal along their juxtaposed edge flanges, which flanges extend respectively around an inside perimeter and an outer perimeter of each of the half-shells. A major portion at least of the length of the juxtaposed flanges of the half-shells is rolled up to form tubes (6, 7) of closed circular section.

Abstract: A vehicle seat is disclosed with built-in safety belt (5). The framework of the seat-back comprises a vertical, laterally located beam (7) which is very resistant to flexional forces and carries the upper anchorage point P of the belt and a lower cross-piece (8) fixed to the base of the beam and sufficiently resistant to prevent transverse inclination of this beam. A strut (10) has its ends mounted for pivoting, respectively, about a transverse axis B linked to the front of the base (1) and about a transverse axis C forming part of the beam. Axis C is disposed at a distance, from the transverse pivoting axis A of the seat-back (4), which is less than 1/6 of the distance separating this axis A from the upper anchorage point P of the belt. The position of axis C about axis A is adjustable.

Abstract: A damping element is provided between bulges of the vertically upwardly extending end sections of the side portions of an upside down U-shaped upper profiled member and the side portions and legs of the upper and lower profiled members. The damping element is made of a deformable semi-flexible material and firmly maintains the upper and lower profiles with respect to one another both in a vertical direction and in a transverse direction.

Abstract: This head-rest is essentially characterized in that the electric motors for actuating in height and in inclination as well as the positioning transmission chains which are respectively associated therewith, are housed in a casing itself mounted inside the head-rest. The electrical connections to these motors end at a connector adapted to be plugged into a connection base fixed permanently to the upper portion of the back-rest of the seat.

Abstract: An adjusting mechanism for the back portion of a seat comprises a fixed circular flange attached to an armature of the sitting portion of the seat. The fixed flange has a cup-shaped recess and cutouts spaced at 120.degree. from one another. Each cutout contains a block with an outer toothing. The blocks are resting on block-pushing members each provided with a finger facing the mobile flange. The block-pushing members rest on a cam with three steps. The fingers of the block-pushing members cooperate with a release ring housed inside the mobile flange and having three projections provided for pushing the block-pushing members toward the center of the adjusting mechanism when the cam is pivoted in a direction for moving the back portion of the seat onto the sitting portion.

Abstract: A threaded rod of a variable length has one end connected to a first part of the element to be adjusted. A pivoted detent element cooperates with the threaded rod, with two channels extending diametrically through the pivoted detent element. The first channel has a threaded wall and the second channel has a smooth wall, the second channel forming an angle of preferably about 15.degree. with the first channel. The pivoted detent element is pivotally mounted in a casing and has a protruding tail. A spiral spring is supported between the tail and the casing. The casing further comprises a rear portion connected to a second part of the element to be adjusted.

Abstract: In a hypocycloidal train mechanism, an annular spring is mounted in front of a roller bearing housed between a double satellite and a control cam on a face turned toward a mobile flange. This annular spring has a semicircular cross-section, with one end of the spring being curved and hooked inside a cutout of the control cam, while the other end of the spring is free.

Abstract: A resilient seat back return device used in two-door vehicles is provided. Between the mobile flange of the articulation and the fixed flange of the same articulation a connection link is pivotally mounted to the sitting portion flange whereby, the connection link is connected by a small helical spring to the module flange of the seat back so that, when the seat back is lowered over the sitting portion, the spring is in an unstressed state while the spring is normally under tension when the seat back occupies an intermediate position and is sufficiently stressed when the seat back is placed in the prolongation of the sitting portion to form a berth, the spring then occupying a position in which it is sufficiently powerful to move up the seat back from the seat. Due to its fixation points a spring of small volume and of short elongation but with a very high pulling force is used.

Abstract: The invention relates to improvements to devices for attaching seat backs on corresponding sitting portions. To assemble a vehicle seat back on a corresponding sitting portion, the seat back comprises two trapezoidal flat cases (1), each containing a bent wire spring (8) whose ends (8.sub.1) are urged towards each other, these ends passing through two horizontal slots formed in the cases. The sitting portion comprises two trapezoidal wedges (2) complementary to the cases. The oblique edges of the wedges are formed with inclined slots (12, 13) through which the ends of the spring also pass.

Abstract: A centralized control unit that includes supply circuits for supplying various motors for controlling movements of parts of a vehicle seat, an in-board power source for feeding the supply circuits, an inverting device for enabling a control with inversion in a rotation direction of the various motors, and a study carrying wheel having a set of studs for enabling a selection of each of the various motors, with each of the set of studs being connected to a circuit of one of the various motors for controlling one of the parts of the seat.

Abstract: A dish is placed in a circular opening about a spindle comprising a central collar. The dish comprises a ball bearing retained by a cage. There is placed inside the dish, concentrically with respect to the spindle, two half-cams separated at the upper ends thereof by an arcuate spiral spring, while the two half cams have lower portions defining a space in which can move a finger rigidly connected to said central spindle containing an articulation control shaft so to form an assembly. The assembly enables, when mounted, passing over hard points by a displacement of the two half-cams one toward the other while compressing the spring under effect of a thrust imparted by the finger of one of the two half-cams. A casing is rigidly connected to the mobile flange for retaining the aforementioned member assembly while a lower and hollow guide rigidly connected to the fixed flange maintains a lower portion of the casing.

Abstract: A platen is fixed onto an armature of a vehicle door and carries a shaft for rotation of a toothed sector about a first pin. A lower portion of the toothed sector extends in the form of a first toothed half-moon cooperating with a second half-moon mounted on a second pin. The first and second pins support a set of arms and a spindle is rigidly connected to each of the half-moons for driving in rotation each of the arms. The pins have a front face which is inclined and forms an angle with respect to a vertical surface of the platen. The arms are arranged in planes enabling an appropriate guiding in height (lifting and lowering) of a curved glass of the vehicle door.

Abstract: A vehicle seat track assembly for allowing a seat to be selectively moved rearwardly and forwardly. The seat track assembly allows the vehicle seat to be secured at a desired selected position. The seat track assembly further allows the seat to be moved forwardly to provide access to the area behind the seat. When the seat is moved forwardly, the seat track assembly has a memory that will remain in place and stop the seat upon its return to the selected position.

Abstract: A seat track assembly is disclosed that comprises a fixed channel member and a sliding channel member disposed on the fixed channel member. The channel members are interfitted with generally U-shaped engagement members. A first ball bearing assembly is disposed at one vertical position between the two channels, and a second disc-shaped bearing is disposed at a lower vertical position between the U-shaped flanges of the two channels. The second bearing provides support in both the vertical and horizontal directions to prevent seizing between the two channels. The second bearing is resilient and acts to prevent seizing of the two channels by providing a resilient force vertically in opposition to the upward force created by the seat back when the seat is unoccupied and also provides resilient forces horizontally to prevent seizing due to twisting of the channels.