Abstract: An adjustable seat of a motor vehicle has a mounting arrangement at each of its lateral regions. The respective mounting arrangement includes an elongated carrier, a support rail which is connected to the seat proper and is displaceable longitudinally of the carrier, and a pivot which mounts the carrier, which extends in the front-to-rear direction, for tilting along a vertical plane. A drive and a driving section of a transmission are mounted on the carrier, the driving section including two pinions which are simultaneously driven by the drive and one of which meshes with a driven rack rigidly connected to the support rail, while the other pinion meshes with another driven rack which is provided at one side of an elongated slot in a support element for the seat proper and is curved having its center of curvature on the axis of the above-mentioned pivot.

Abstract: A motor-vehicle seat hinge has an upper hinge element secured to the back part of the seat and a lower hinge element secured to the seat part, a positioning plate securable at any of a plurality of angularly offset positions and coacting with an abutment on the upper element to define the rest position for the seat back. An inertial two-arm pawl is pivoted on the upper hinge element and has on one arm a stop face which is engageable with the positioning plate in a blocking position of this pawl to prevent forward pivoting of the seat back. The other arm of the pawl is weighted so as normally to pivot from this blocking position into a freeing position when The back part is slowly pivoted forwardly but to resist due to its inertia the change of its position when the back part is subject to an abrupt forward movement.

Abstract: An adjustable seat is mounted on a base for adjustment of its position longitudinally of a motor vehicle, by means of two guiding arrangements, each located at one side of the seat and each including a front guide track and a rear guide track. The seat is arrestable in a multitude of adjusted positions by at least one arresting mechanism which includes a rack mounted on the base, a pinion mounted on the seat for rotation in mesh with the rack, a ratchet connected to the pinion for joint rotation therewith, and a pawl displaceably mounted on the seat and engaging the ratchet to arrest the seat in any selected one of the multitude of adjusted positions. The rack may extend parallel to one of the guide tracks and then a support member which supports the seat on this guide track may be mounted coaxially with the pinion.

Abstract: A motor-vehicle seat is carried on at least one slide displaceable along a guide rail having an upper edge formed with a plurality of upwardly open notches. Inside this guide rail is an adjustment member which is vertically displaceable so as frictionally to engage the guide rail and arrest the slide relative to the seat. Furthermore a safety member is provided which is also carried on the slide and which is displaceable toward and away from the notches formed in the upper edge of the guide rail. Respective springs urge the adjustment and safety members into the positions locking the slide and rail relative to each other. A common handle is actuatable to pull the adjustment member out of engagement with the rail and to pull the safety member also out of engagement with the notches of the rail. Thus in case of a collision even if the frictional engagement of the adjustment member with the rail is insufficient to lock the seat in position, the engagement of the safety member with the notches will suffice.

Abstract: A motor-vehicle seat has a seat part and a back part interconnected by means of a hinge having a first hinge element secured to one of these parts and a second hinge element secured to the other part and pivotal on the first element about a horizontal axis. One of these elements is formed as a ring gear with an annular array of inwardly directed teeth and the other element carries a plurality of individually pivoted pawls which can be swung radially outwardly into mesh with these teeth to lock the two elements relative to each other. A cam is provided for radially pivoting these pawls to lock the seat back in any position relative to the seat part. Each pawl has a pivot pin secured in the respective hinge element which is also provided with a plurality of formations adjacent the front ends of these pawls so that even if the pivot pins of the pawls break off the pawls will be supported inside the hinge and the two hinge elements will not be able to pivot relative to each other.

Abstract: A motor-vehicle seat displaceable relative to a fixed support in a motor vehicle between a pair of end positions is powered by a motor whose output shaft may be rotatable in only a single predetermined rotational sense. Mechanism is provided having an input rotatable in one direction for displacing the seat on the support of the motor-vehicle from one end position into the other end position and rotatable in the other opposite direction for displacing the seat on the support from the other end position into the one end position. A motion-converting transmission is connected between the output shaft of the motor and the input of the displacement mechanism for automatically driving this input alternately in the one direction and in the other direction on continuous rotation of the motor output shaft in only the one sense.

Abstract: An adjustable seat includes a seat element which is mounted in a motor vehicle for adjustment of the position thereof on two mounting arrangements each of which is arranged at one lateral region of the seat element and each of which includes a first guide track extending substantially horizontally and associated with the front region of the seat element, a support rail telescopically guided on the first guide track and pivotally connected to the seat element on the free front end thereof, an elongated second guide track inclined upwardly in the forward direction and associated with the back region of the seat element, and a support member connected to the rear region of the seat element and supporting the latter on the second guide track. The first guide track and the second guide track are arranged laterally adjacent one another at the associated lateral region of the seat element.