Patents by Inventor Jan-Åke Gavén

Jan-Åke Gavén 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).

  • Refining element for a refining disk
    Patent number: 6764554
    Abstract: Refining elements for refining discs for disc refiners for the manufacture of mechanical pulp are disclosed, having improved wear resistance by utilizing alloys with precipitated carbides. An improved service life is obtained with a refining disk having the following analysis in % by weight: 2.96 C, 0.77 Si, 0.82 Mn, 24.2 Cr, 5.16 v, 0.04 Ni, 0.03 Mo, and the reminder Fe and impurities. After casting, the refining segments are hardened and annealed and assume a hardness of 57-63 HRC.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: July 20, 2004
    Assignee: Valmet Fibertech AB
    Inventor: Jan-Åke Gavén