Patents by Inventor Sven-Erik Dahlberg

Sven-Erik Dahlberg 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 and device for chill molding
    Patent number: 6422295
    Abstract: Method and device for casting cast iron including a metal chill mold (100) having outer walls (206, 208, 210) and inner walls (212, 213, 220). The inner walls are in contact with a mold (300). The device further includes pressurizing means (400) for applying a variable pressure on the outer walls (206, 208, 210) of the chill mold, in order to control changes in volume of molten material enclosed by the chill mold, and chill mold cooling means (500) for variable cooling of the inner walls (212, 213, 220) of said chill mold.
    Type: Grant
    Filed: May 3, 2001
    Date of Patent: July 23, 2002
    Assignee: Volvo Lastvagnar AB
    Inventors: Bengt-Åke Larsson, Bertil Sander, Roland Carlsson, Sven-Erik Dahlberg
  • Method and casting mold for the production of cast-iron cylinder liners
    Patent number: 5370170
    Abstract: A method for producing a cast-iron cylinder liner for piston engines in which a metal chill mold (1) is used which has a tubular mold cavity (2) lined with a layer of a hardening molding material or green sand (3). The melt (7) is introduced into the mold cavity from above in such a manner that the cooling effect from the chill mold and the lining provides a frontage of solidification directed upwardly from the bottom.
    Type: Grant
    Filed: April 2, 1993
    Date of Patent: December 6, 1994
    Assignee: AB Volvo
    Inventors: Bertil Sander, Sven-Erik Dahlberg, Tibor Szabo, Berndt Gyllensten