Patents by Inventor Jorma Petäjistö

Jorma Petäjistö 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 controlling a multi-phase screening apparatus
    Patent number: 6186333
    Abstract: The invention relates to a method for controlling a multi-step screening apparatus (1), the method comprising controlling other accept, reject and dilution flows in relation to the flow measured in the accept channel (7a) of the first screening step (3a). Thus a simpler control unit (9) can be used and accept of higher quality can be obtained than before. The invention further relates to an apparatus for controlling a multi-step screening apparatus (1), said apparatus comprising a control unit (9) arranged to measure the flows of all accept, reject and dilution water channels (7a-7c, 5a, 5b, 11a, 11b) and to adjust the flow of the other channels on the basis of the flow of the accept channel of the first step.
    Type: Grant
    Filed: September 17, 1999
    Date of Patent: February 13, 2001
    Assignee: Valment Corporation
    Inventors: Jouko Hautala, Juhani Valli, Timo Vuorinen, Jorma Petäjistö