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Smooth Non-Linear Springs, Particularly Smooth Progressive-Rate Steel Springs

[+] Author Affiliations
Wieslaw J. Oledzki

Warsaw Agriculture University, Poland

Paper No. IMECE2007-43242, pp. 319-328; 10 pages
  • ASME 2007 International Mechanical Engineering Congress and Exposition
  • Volume 3: Design and Manufacturing
  • Seattle, Washington, USA, November 11–15, 2007
  • Conference Sponsors: ASME
  • ISBN: 0-7918-4297-5 | eISBN: 0-7918-3812-9
  • Copyright © 2007 by ASME


In this paper I discuss my invention that solves the problem of designing and manufacturing springs made of elastic materials, particularly steel springs, with prescribed characteristic (dependence of flex on external load) given by a smooth (i.e. differentiable) non-linear function. The method according to the invention consists in forming an elastic body with suitably shaped regions of diversified stiffness and (possibly) diversified initial internal stresses. This suitable shape of the regions lies at the hart of the invention and is briefly discussed in the paper. I also give some formulas for the spring characteristic of the springs according to the invention and describe a method for obtaining these formulas. The paper is a companion to my patent applications “Smooth non-linear springs, particularly smooth progressive rate steel springs, progressive rate vehicle suspensions and method”, US 11/950,935 and PL P380,914.

Copyright © 2007 by ASME
Topics: Steel , Springs



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