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: 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 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.