Patents by Inventor Istvan Fejerdy

Istvan Fejerdy 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).

  • Air-spring, in particular for the use under extreme conditions
    Patent number: 5024424
    Abstract: An improved air spring with a diaphragm fixed to a closing element by overlapping fitting, wherein the diaphragm is made of rubber or any other synthetic material similar to rubber, it is provided with a strength carrier insert and it has on one or both ends flanges reinforced with steel wire or any other suitable wire. The closing element is a cylindrical-symmetrical flanged disc, made of sheet-material processed expediently by sheet-deformation, which is subdivided into sections promoting assembly with introductory continuously increasing and thereafter reduced local diameter.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: June 18, 1991
    Assignee: TAURUS Gumiipari Vallalat
    Inventors: Istvan Fejerdy, Otto Farkas, Gabor Havasi