Patents by Inventor Gert I. S. Sundstedt

Gert I. S. Sundstedt 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).

  • Method of making a roll with a composite roll ring of cemented carbide and cast iron
    Patent number: 5167067
    Abstract: The present invention discloses a roll for hot and/or cold rolling. The rolling track comprises one or several cemented carbide rings, which are cast into a casing made by an iron alloy. The cast alloy comprises a materially graphitic cast iron, which after the casting contains residual austenite. This residual austenite is at subsequent heat treatment or treatments partly or totally transformed under volume increase to mainly bainite with the aim of reducing or totally eliminating the differential shrinkage between the cast iron and the cemented carbide as a result from cooling after the casting.
    Type: Grant
    Filed: December 27, 1991
    Date of Patent: December 1, 1992
    Assignee: Sandvik AB
    Inventors: Gert I. S. Sundstedt, Ingvar J. Carlsson
  • Method for manufacture of a roll ring comprising cemented carbide and cast iron
    Patent number: 5104458
    Abstract: The present invention discloses a roll ring for hot and/or cold rolling. The rolling track comprises one or several cemented carbide rings, which are cast into a casing made by an iron alloy. The cast alloy comprising a materially graphitic cast iron, which after the casting contains residual austenite. This residual austenite is at subsequent heat treatment or treatments partly or totally transformed under volume increase to mainly bainite with the aim of reducing or totally eliminating the differential shrinkage between the cast iron and the cemented carbide as a result from cooling after the casting.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: April 14, 1992
    Assignee: Sandvik AB
    Inventors: Gert I. S. Sundstedt, Ingvar J. Carlsson
  • Roll ring comprising a ring of cemented carbide metallurgically bonded to a cast iron body
    Patent number: 5044056
    Abstract: A roll ring for hot and/or cold rolling. The rolling track comprises one or several cemented carbide rings, which are cast into a casing made by an iron alloy. The cast alloy comprises a materially graphitic cast iron, which, after casting, contains residual austenite. This residual austenite is, at subsequent heat treatment or treatments, partly or totally transformed under volume increase to mainly bainite with the aim of reducing or totally eliminating the differential shrinkage between the cast iron and the cemented carbide, which develops as a result of cooling after casting.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: September 3, 1991
    Assignee: Sandvik AB
    Inventors: Gert I. S. Sundstedt, Ingvar J. Carlsson