Patents by Inventor Herman E. Vanderheyden

Herman E. Vanderheyden has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 3995336
    Abstract: This invention relates to a spring mat, more particularly intended for the manufacture of resilient surfaces, which comprises substantially a series of known spring elements connected with each other into a cloth or a mesh work, each of said elements consisting of a single wire of spring steel which is bent to present a series of mutually parallel spiral pairs, each pair consisting of two substantially coaxial spirals, namely a raising spiral and a descending spiral, a metal strip being additionally inserted through all the spiral pairs of each spring element.
    Type: Grant
    Filed: August 22, 1975
    Date of Patent: December 7, 1976
    Inventor: Herman E. Vanderheyden