Patent ID: 8033367

Claim:
An axial damper for an element having a cylindrical, rectangular or squared section, comprising: two identical fixing clamps configured to be attached around said element, each clamp including an upper part and a lower part connected to each other by clamping means; at least two rafter-tie-rods disposed between the clamps on a periphery of the element and each connected at an end thereof to the clamps, the rafter-tie-rods being equidistant from each other in a case of more than two rafter-tie-rods; and two damping systems each associated with the lower part of a respective fixing clamp and including two or more blocks of elastomeric material, with a pre-compressed elastic element interposed therein, wherein the pre-compressed elastic element is an elastic support with variable load, comprising: two identical supporting disks, each including a central axial hole and at least three axial holes, all or all except one of the holes equidistant from each other and also with respect to a central axis of the disks, and including at least three radial holes, each of the radial holes extending from the side surface until reaching one of the axial holes and all of the holes or all except one, at the same distance from each other; at least two pins with relative piles of cup springs for insertion between the supporting disks, the pins positioned a number of axial holes in each supporting disk equal to the number of pins; a central sleeve axially constraining the two supporting disks in a radial direction by means of the central holes; a pin with a graded scale, positioned between the supporting disks by one of the axial holes for each supporting disk; and a permanent fixing means, fixing the pin with a graded scale, positioned in one of the radial holes of one of the two disks.