Patents by Inventor Mikko Aimo Antero Kumpula

Mikko Aimo Antero Kumpula 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).

  • Patent number: 5756909
    Abstract: The invention relates to the filed of powder metallurgy. A steel is disclosed, which is compacted from a powder mixture by means of pressure and heat, its microstructure arising mainly from two components, the first of which being austenitic (e.g., Hadfield manganese steel) and the second being an essentially martensitic component rich in hard precipitates. The austenitic microstructure is more ductile than the martensitic, and it effectively prevents the propagation of microscopic cracking. Thus, the material is suitable for use in wear parts subjected to strong forces, as in, e.g., stone crushers.
    Type: Grant
    Filed: January 14, 1997
    Date of Patent: May 26, 1998
    Assignee: Rauma Materials Technologies, OY
    Inventors: Jari Ilmari Liimatainen, Mikko Aimo Antero Kumpula