Patents Examined by Hubert P. Lorin
  • Method of making a shaft seal ring
    Patent number: 4672733
    Abstract: A method of making a shaft seal ring starts with a tube, optionally provided on its outside and/or inside with hydrodynamically-acting return elements, as may be cut from a hollow cylinder. The tube is axially slipped along a form with a continuously increasing diameter until its leading or lower end is shaped into a flange in the radial direction. The flange may be simultaneously joined to a reinforcing ring.
    Type: Grant
    Filed: May 28, 1985
    Date of Patent: June 16, 1987
    Assignee: Firma Carl Feudenberg
    Inventor: Wilhelm Schmitt