| 摘要 |
PCT No. PCT/EP90/01513 Sec. 371 Date Jun. 24, 1991 Sec. 102(e) Date Jun. 24, 1991 PCT Filed Sep. 7, 1990 PCT Pub. No. WO91/03193 PCT Pub. Date Mar. 21, 1991.The upper seat part according to the instant invention is provided with several ridges 2, 3, 4, 5, 6 extending from its bottom part 1 upward, said ridges being approximately parallel to each other as well as transversal to the seating direction, whereby the forward ridges 2, 3 are inclined toward the front while the other ridges 4, 5, 6 are inclined toward the back. The ridges 2, 3 are equipped laterally, at their upper free ends with projections 7,8 extending approximately at a parallel to the bottom part 1 toward the back side while the ridges 4, 5, 6 inclined toward the back are provided with projections 9, 10, 11 laterally at their upper free ends, said projections extending also approximately at a parallel to the bottom plate 1, however toward the front, so that the projections 7, 8, 9, 10, 11 partly cover the ridge intervals 12 and constitute a seating surface 13 together with the upper free ends of the ridges 1, 3, 4, 5, 6. |
