Patents by Inventor Risto Karojärvi

Risto Karojärvi 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 measuring arrangement for monitoring the condition of a grinder stone of a pulp grinder
    Patent number: 7564363
    Abstract: A method and a measuring arrangement for monitoring the condition of a grinder stone of a pulp grinder. A temperature profile for a grinding surface of the grinder stone is determined substantially along the entire length of the grinder stone, a variable representing at least one piece of temperature data of the grinding surface of the grinder stone is determined on the basis of said temperature profile, and the variable representing said temperature data is compared with a reference variable corresponding to said temperature data. If this variable differs from the reference variable in a predefined manner, the state relating to the condition of the grinder stone is identified as abnormal.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: July 21, 2009
    Assignee: Metso Paper, Inc.
    Inventors: Olli Tuovinen, Risto Karojärvi, Juhani Valli