housing on which the load rests the device includes means for automatically and irreversibly inserting a damping unit between the load and its bearing point on the floating support as soon as the weight of the load is removed from the bearing point application_number US 29545381 A description as illustrated in fig1 and 5 a device in accordance with the invention includes a housing 10 integral with a floating support 70 for a load 1 the housing 10 has two strong solid parts 30 on two of its surfaces a sleeve 11 with a cylindrical side wall 12 and an end plate 13 at the upper end of the side wall is disposed inside this housing a shock absorber 14 e g an elastomer block is placed at the end of the sleeve 11 a chock 15 with an inclined lower surface 16 is placed beneath this shock absorber it is placed at the end of a cylindrical box 17 which is vertically slidable in the sleeve 11 more or less compressing the shock absorber 14 a wedge 18 with an inclined upper surface 60 co operates with the chock 15 and passes through the housing 10 the sleeve 11 and the box 17 via slots 19 provided through the solid parts 30 of the housing 10 slots 20 through the sleeve 11 and slots 21 through the box 17 the wedge 18 rests against the ends 50 of the slots 19 provided in the solid parts 30 pulling on the wedge 18 in the direction of arrow f raises the chock 15 and if no heavy weight is applied to the top of the end plate 13 of the sleeve 11.