Patent ID: 6119409
Filing Date: 2000-09-19
Classification: A01K,A42B,B44C,B63B,B63C,E04B

Abstract:
A method for forming an expanded structure, comprising the following steps:(a) providing a solid block of material having a first surface and an opposite second surface substantially parallel to the first surface;(b) forming a plurality of concentric sections from the block of material, with the sections comprising an outermost section, an innermost section, and at least one intermediate section, so that the outermost and intermediate sections each have inner walls and the innermost and intermediate sections each have outer walls with first surface peripheries which are smaller than their second surface peripheries;(c) separating each of the sections from one another; and(d) forming an expanded structure by assembling the sections substantially concentrically with one another, with at least a portion of the innermost section bearing against at least a portion of the at least one intermediate section and at least a portion of the intermediate section bearing against at least a portion of the outermost section.