a tractive force on threaded block 69 which in turn puts tension pin 70 in traction tension pin 70 is frictionally and hingedly affixed to the lower surface of basket detent 58 tractive force is applied to basket 52 in the direction of arrow a as the basket travels it is guided through its preferred path by sliding frictional contact with the curvilinear surfaces of guides 62 and 64 tension pin or wire spoke or the like 70 is anchored in both the threaded block 69 and the basket slider end by means of a notch eye bracket or the equivalent the anchors at either end of the pin have some clearance preferably 15 20 degrees so that the pin is free to traverse or nutate somewhat in order to accommodate the arcuate path of the slide in the housing channel 53 as the motor 68 extends the paddle optionally spring 74 may be interposed between the basket and the traction pin to insure against breakage from abusive loads to further mediate tensions placed on the device and or to promote the comfort of a seat occupant it is clear from the depictions in fig5 and 6 that only one end of the basket is fixed to the support housing 66 and thereby to the seat the other end of the basket weight supporting pressure surface 50 moves freely from any fixation to the support housing 66 or seat pressure surface 50 acts outwardly towards the passenger through the fabric of the seat cover padding or optionally through any conventional seat support systems such as webs wires or lateral sinusoidal springs the pressure area end 50 of the basket 52 being free flexes under pressure a flexed position 76 is depicted in fig6 this flexed position would be assumed.