Abstract: A seat comprising a seat base portion which is adjustable in respect of inclination has a seat base frame which is mounted pivotally at its rearward portion on a supporting arrangement. Disposed on the supporting arrangement in the front region thereof is a rotary shaft, with a lever arm secured to each end thereof. The lever arms are in turn pivotally connected to the seat base frame. At least one of the lever arms has a plurality of detent openings which are disposed in an arcuate array and which can be selectively engaged by a detent member carried by the seat base frame, to latch the seat base frame in the desired inclined position. The actuating lever for the detent member is disposed at the side of the seat, within easy reach of the occupant thereof.

Abstract: The seat has a backrest with a back support integrated therein, comprising a curved spring plate member which bears against the rear of the backrest cushion. The distance, as measured in the heightwise direction of the backrest, between the upper and lower edges of the spring plate member can be adjusted by manual or motor-driven means to vary its curvature and the resistance to bending of the spring plate member is lower in its lower region than in its upper region whereby, when the distance between its upper and lower edges is progressively reduced, the spring plate member initially becomes more curved in its lower region until a restricting means comes into action to limit that initially produced increase in curvature, with the result that the curvature in the upper region is then increased.

Abstract: In a travel seat comprising a backrest, at least one armrest and a seat cushion, there is provided a support plate member which, disposed at the front end of the armrest in a horizontal position is pivotal in its horizontal plane about a vertical axis and, in the position in which it is swung out, is rotatable about a horizontal axis and can be swung in under the armrest.

Abstract: In a seat cushion with a textile cover, a lined foam layer on the textile cover and a cold foam core, a skin is formed on the lined foam at the side adjacent the cold foam core which prevents a penetration of the cold foam into the lined foam.

Abstract: An air-sprung vehicle seat wherein adjustment in respect of weight is provided by a control cam and two spaced-apart switches actuable thereby upon relative movement thereof in dependence on a variation in the seat height. One of the switches controls the supply of air into the air spring and the other the discharge of air therefrom. The switches each have two actuating stages such that, with increasing actuation, the first actuating stage serves as an idle stage and it is only in the subsequent second actuating stage that the respective switch is switched on, while, with decreasing actuation, a switch which has been switched on remains switched on until both actuating stages have passed.

Abstract: A driver's seat for tractors or the like has a system such as crossing levers or a parallelogram for keeping it horizontal on changes in level, which take place when a spring under the seat is compressed. For making possible adjustment to different weights of drivers without changing the natural frequency of the springing motion upwards and downwards of the seat, the spring has two runners acting on cams on the levers of the system so that, when the spring is moved in relation to the cams, the leverage of the spring by way of the levers on the top part of the seat is changed. Such horizontal motion of the spring is produced by a carriage pushed backwards and forwards by a threaded rod with a handwheel.

Abstract: A sprung vehicle seat which adjusts to a preset height, even when accommodating people of different weights, and which also permits adjustment of the preset height, is supported by a gas spring. An actuator which is linearly movable when there is a change in the seat height can cooperate with a switching mechanism, which includes a valve spaced apart from a switch, to control the volume of air in the gas spring. A holder carrying either the switching mechanism or the actuator is pivotably mounted on a slider which is linearly movable unless it is locked into place. When the holder is in a first angular position, the actuator and the switching mechanism are separated to avoid unnecessary actuation of the gas spring during bouncing movements, and when it is in a second angular position the actuator and the switching mechanism are moved toward each other so that they can cooperate to adjust the seat to the preset height.

Abstract: A commerical vehicle seat with a mechanism for adjusting the seat to the weight of the driver, wherein there is provided a support plate for the backrest of the seat capable generally of upright motion relative to a backrest support. Between the backrest support plate and the support backrest there is at least one spring for biasly a seat support bracket, with one end of the spring being able to be moved in relation to the backrest support plate (or the backrest support) by an adjustment member which adjusts to different weights. More specifically, this end of the spring is connected to a support lever which may be rotated about a generally horizontal axis and is fixed to the backrest support, while the other end of the spring is acted upon by an adjustment lever which may be spring-locked in a number of different positions for keeping the support lever in different positions of adjustment. The adjustment lever is also rotatably fixed to the backrest support.

Abstract: In a seat having a seat plate of adjustable inclination and a backrest of adjustable inclination, gas springs are provided for adjusting the inclination of the seat plate and backrest, the valve actuating pins of the gas springs being oppositely disposed and actuatable by an adjusting lever. The adjusting lever extends transversely to the valve actuating pin arrangement and is mounted to pivot vertically and horizontally about a common pivot point disposed beyond the straight connecting line between the valve actuating pins. In the preferred embodiment, two control arms on the seat carrier are movable in a scissor-like manner in a vertical plane containing the valve pin arrangement, the adjusting lever engaging between and co-operating with the control arms which co-operate with the valve actuating pins. This permits the inclination of the seat plate and the inclination of the backrest to be adjusted with a single operating element either at independent times or simultaneously.

Abstract: A retractor for safety belts having a winding shaft acted upon by a retracting spring, and journaled in a housing so as to be non-displaceable axially, a detent disk provided with detent elements distributed over its periphery and fixed to the winding shaft, and a counter-detent member anti-rotationally joined to the housing and having at least one counter-detent element. The detent disk is disposed fixedly in the axial direction on the winding shaft while the counter-detent disk is axially displaceable on the winding shaft between the detent disk and a housing wall and is secured against rotation by lugs extending from the housing wall approximately parallel to the winding shaft towards the detent disk and engaging notches in the counter-detent disk. A spring extends between the counter-detent disk and the housing wall. A pushbutton displaceable axially to the winding shaft serves as actuating member for the counter-detent disk and grips the same.

Abstract: A push button lock for a safety belt is described including a first lock part which has an insertion aperture at one end, and a second slide in tongue part which is insertable into the opening in an axially extending plane of the first part. Within the first part there is a receiving housing which includes a web portion with a side wall on each side edge of the web portion which latter has a fixed stop which is engageable on a transverse edge formed on the tongue.A slot is provided in each side wall of the receiving housing and this has a first part which is parallel to the axial plane and a second part inclined with respect thereto. The housing has a push button which is axially slideable therein and this comprises a cross-bar, two side walls which are spaced apart by the cross-bar and a manually actuable portion at the insertion opening end of the lock part.

Abstract: The seating member of a vehicle seat is mechanically lockable in a selected one of at least three defined positions. In one of these positions (normal position) the seating member is substantially parallel to the ground on which the vehicle is standing or travelling. In the at least two other positions, one on each side of said normal position, the seating member is tilted about a pivotal axis parallel to the direction of vehicle travel.

Abstract: A driver's seat is automatically adjustable for height in response to the weight of the person sitting in it. The seat is carried by a spring suspension which is displaceable by a reversible servo-motor. Scanning means for controlling the motor comprise an actuating member and two vertically spaced sensors, either the actuating member or the sensors being secured to the seat for movement therewith and the other being stationary. If the seat carries a lightweight person, the spring suspension permits it to descend to a position where the actuating member and the upper sensor co-operate to activate the servo-motor to displace the suspension for lowering the seat still further, whereas in the case of a heavy person the actuating member and the lower sensor are effective to raise the seat.

Abstract: A seat comprising upholstery on a base plate is provided with means for adjusting the height of the upholstery surface at least at the front of the seat, said adjusting means comprising an intermediate plate interposed between the upholstery and the base plate to define with the base plate a tapered gap. The intermediate plate is pivoted to the base plate about a transverse axis and rests on a displaceable supporting member disposed in the gap at a selected spacing from the transverse axis. To adjust the height of the upholstery, the supporting member is moved further towards or away from the transverse axis.

Abstract: There is proposed a seat of adjustable height having a seat part coupled by a connecting element to a supporting lever acted upon by supporting spring means, the lever being swingable against the action of the supporting spring means by a load acting on the seat part. In order to enable easy height adjustment with a simple construction in such a seat the connecting element is adjustable relative to the supporting lever to change the height of the seat part and a locking device is provided by means of which the connecting element and the supporting lever can be locked in several different relative positions. To enable height adjustment without use of a special lever the locking device may be constructed to lock the connecting element and the supporting lever in a series of relative positions as the seat part is raised and when the seat part reaches an upper end position to set itself in a disengaged condition which is maintained until the seat part is lowered to a lower end position.

Abstract: In a seat particularly suitable for automobiles and comprising a backrest and seating member, an armrest assembly at the side of the seat comprises an armrest hinged to a supporting lever therefor. The supporting lever is pivotably mounted for movement between a first position where it and the armrest extend alongside the seating member and a second position where it and the armrest extend alongside the backrest. The supporting lever can be propped in an intermediate position at which the armrest is supported in a position of use at a suitable elevation above the seating member.