Patents by Inventor Bengt N. During

Bengt N. During 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).

  • High pressure isostatic densification process
    Patent number: 5151247
    Abstract: The present invention is a method for densifying powder metallurgical parts to 100% theoretical density. The method comprises applying a high pressure of 0.1-100 MPa during sintering in a high pressure furnace at a temperature before which the liquid phase is formed and maintaining this pressure during the rest of the sintering cycle until the furnace has cooled to almost room temperature. The method achieves rapid, complete closure of the porosity which results in parts with close dimensional tolerances and practically no warpage.
    Type: Grant
    Filed: November 1, 1991
    Date of Patent: September 29, 1992
    Assignee: Sandvik AB
    Inventors: Bengt O. Haglund, Bengt N. During