Patents by Inventor Wilhelm Kallen

Wilhelm Kallen 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).

  • Process for production of a hollow casting
    Patent number: 4942915
    Abstract: A casting pattern and process for producing a hollow casting. The casting pattern has a foamed material body and can be constructed to prevent seams or fins from forming at points which are accessible only with difficulty, such as inside points. The contour of the foamed material body is covered on one side with a refractory mold part which is to be molded into the produced casting to form a corresponding part of the contour of the produced casting.
    Type: Grant
    Filed: August 25, 1988
    Date of Patent: July 24, 1990
    Assignee: Eisengiesserei Monforts GmbH & Co.
    Inventors: Wilhelm Kallen, Ulrich Quack
  • Cast-iron element
    Patent number: 4927688
    Abstract: A cast-iron element with a non-iron interior area utilizes a molding core formed of a glass material, which may be tubular or solid and may, as desired, be entirely enclosed within the casting.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: May 22, 1990
    Assignee: Eisengiesserei Monforts GmbH & Co.
    Inventors: Rudi Hass, Georg Jansen, Wilhelm Kallen
  • Method of producing a cast-iron element
    Patent number: 4832107
    Abstract: A method and apparatus for casting a cast-iron element with a non-iron interior area utilizes a molding core formed of a glass material, which may be tubular or solid and may, as desired, be entirely enclosed within the casting.
    Type: Grant
    Filed: December 15, 1987
    Date of Patent: May 23, 1989
    Assignee: Eisengiesserei Monforts GmbH & Co.
    Inventors: Rudi Hass, Georg Jansen, Wilhelm Kallen