Patents by Inventor Patrick J. Tessier

Patrick J. Tessier 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).

  • Automatic refiner load control
    Patent number: 5500088
    Abstract: The load on a refiner motor is controlled by adjusting the motor load setpoint by monitoring load applied by the refiner and the plate gap between the refiner plates to define the curve of the load versus plate gap relationship. This slope of load versus plate gap relationship is estimated and when the sign of the slope of the curve changes sign indicating operation in an unstable zone of pad collapse and based on the tendency for the refiner to be in the unstable operation zone over a selected period of time exceeding a preset limit adjusting the setpoint lower to approach more closely the maximum load applied over the selected time.
    Type: Grant
    Filed: March 14, 1995
    Date of Patent: March 19, 1996
    Assignees: MacMillan Bloedel Limited, The University of British Columbia
    Inventors: Bruce J. Allison, Joe E. Ciarniello, Guy A. Dumont, Patrick J. Tessier