Patents by Inventor Kari Harakkamäki

Kari Harakkamäki 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 arrangement for feeding wood batches into a pressure grinder
    Patent number: 6929202
    Abstract: A method of feeding a wood batch into a pressure grinder, the method comprising first collecting the wood batch to be fed into the grinder into a separate batch chamber above a side feeding chamber, from which the wood batch is lowered vertically by means of a separate supporting plate to the side feeding chamber. Thereafter, the wood batch is transferred from the side feeding chamber into the feeding chamber. An arrangement for feeding a wood batch into a pressure grinder comprises a batch chamber above a side feeding chamber and in which the wood batch to be fed into the pressure grinder is formed before it is lowered into the side feeding chamber.
    Type: Grant
    Filed: May 1, 2003
    Date of Patent: August 16, 2005
    Assignee: Metso Paper Inc.
    Inventors: Pekka Haikkala, Kari Harakkamäki, Simo Setälä