Patents by Inventor Lauri Uusivirta

Lauri Uusivirta 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).

  • Apparatus for checking need for maintenance and viscometer
    Patent number: 10429285
    Abstract: An apparatus for checking a need for maintenance of a viscometer measuring consistency of suspension comprises a rigid rod and an elongated cavity in a measuring arm of the viscometer. The rigid rod is matched with the cavity for the rod to be movable in the cavity. The cavity is configured to become mismatched with respect to the rod in response to a bending of the measuring arm, the mismatch indicating a need for maintenance of the viscometer.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: October 1, 2019
    Assignee: VALMET AUTOMATION OY
    Inventors: Lauri Uusivirta, Matti T. Mäkelä
  • APPARATUS FOR CHECKING NEED FOR MAINTENANCE AND VISCOMETER
    Publication number: 20170268975
    Abstract: An apparatus for checking a need for maintenance of a viscometer measuring consistency of suspension comprises a rigid rod and an elongated cavity in a measuring arm of the viscometer. The rigid rod is matched with the cavity for the rod to be movable in the cavity. The cavity is configured to become mismatched with respect to the rod in response to a bending of the measuring arm, the mismatch indicating a need for maintenance of the viscometer.
    Type: Application
    Filed: March 7, 2017
    Publication date: September 21, 2017
    Applicant: VALMET AUTOMATION OY
    Inventors: Lauri UUSIVIRTA, Matti T. MÄKELÄ
  • Method for measuring consistency, chopper structure, and consistency meter
    Patent number: 7752894
    Abstract: The method measures consistency with a rotating consistency meter. The method comprises chopping with the teeth of a chopper structure optical radiation transmitted by an optical source to an optical detector while the shafts of the rotating consistency meter rotate. In addition, a chopper reference of the chopper structure chops optical radiation to form at least one reference pulse independent of the swivel between the shafts. The duration of each reference pulse is measured when measuring consistency. The change in the reference pulse is defined by comparing the duration of the measured reference pulse with the duration of the predefined reference pulse. The durations of the measuring pulses are corrected according to the change in the duration of the reference pulse.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: July 13, 2010
    Assignee: Metso Automation Oy
    Inventors: Lauri Uusivirta, Juhani Kangas
  • Method for Measuring Consistency, Chopper Structure, and Consistency Meter
    Publication number: 20090000357
    Abstract: The method measures consistency with a rotating consistency meter. The method comprises chopping with the teeth of a chopper structure optical radiation transmitted by an optical source to an optical detector while the shafts of the rotating consistency meter rotate. In addition, a chopper reference of the chopper structure chops optical radiation to form at least one reference pulse independent of the swivel between the shafts. The duration of each reference pulse is measured when measuring consistency. The change in the reference pulse is defined by comparing the duration of the measured reference pulse with the duration of the predefined reference pulse. The durations of the measuring pulses are corrected according to the change in the duration of the reference pulse.
    Type: Application
    Filed: April 27, 2006
    Publication date: January 1, 2009
    Inventors: Lauri Uusivirta, Juhani Kangas