Abstract: This invention concerns a method for providing a massage, especially to the back areas of persons who have to sit for a relatively long time on seats, especially motor-vehicle seats. This massage is achieved in accordance with the invention by a periodic or a continuous motion of massage elements placed in the seat surface and/or in the backrest, in a forward and backward and/or up and down direction, with this motion being within the range of sitting surfaces and/or back surfaces of such persons.

Abstract: An elastic contouring assembly for a lumbar support system includes an adjustable contouring element having a central longitudinal strut and an integral shoulder for attachent of an adjustment device. A tensioning cable having one end attached to the contouring element and an opposite end attached to the adjustment adjusts the curvature of the contouring element. Guide elements extend from the central longitudinal strut and include aperatures to receive the tensioning cable. Each of the apertures define an individual clearance height from the central longitudinal strut, and as the clearence heights differ, the radius of the contouring element can be adjusted by extending or retracting the tensioning cable.

Abstract: The invention relates to an apparatus for the level adjustment and/or arching adjustment of a flexibly resilient support element (4) for the lordosic vertebrae of a sitting person, and which is fitted in the frame (1) of a back rest of a seat, each apparatus comprising a gear mechanism (12) including a worm (14), a worm gear (15), a pinion (16) and a tooth element as well as a drive means. According to the invention the gear mechanism is directly connected to the drive means in such a manner that the rigid drive shaft (13) thereof carries the worm (14) engaging into the worm gear (15), the pinion (16) being fixed axially in the worm gear (15) in tooth engagement with a gear wheel (17) in a plane parallel to the worm gear (15).

Abstract: A seat back rest with an adjustment device for a flexible arching element (5) arranged on a frame (1) for adjusting the convex curvature of the back rest. According to the seat back rest, it has an additional pelvic support (17) connected to the flexible arching element (5), the pelvic support (17) being composed of an attachment (16, 23, 28) to the flexible arching element (5) directed towards the seat.

Abstract: An adjustment device is provided for use with a pelvis and/or lordosis support arranged in a back support connectable with a seat. The adjustment device contains an axially movable, threaded spindle (2) guided in a housing (1), a threaded ring (4), and an adjustment handle (3), and the housing (1) and the threaded spindle (2) each have an axial, central bore (6, 7) for passing through the cable line (9) of a Bowden-cable arrangement (10). The bores (6, 7) are aligned with each other, whereby the central bore (6) in the threaded spindle (2) has ha hollow space directed at the adjustment handle (3) for inserting and holding a nipple (14) of the one end of the cable line. Provision is made in the side wall of the housing (1) for a radial opening (11), and in the side wall of the threaded spindle (2) for a cross bore (12) ending within the zone of the holding of the nipple (14).