Patents by Inventor Walter Grassens

Walter Grassens 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).

  • Load sharing control for compressors in series
    Patent number: 10400776
    Abstract: In some aspects, a compressor system includes a compressor train including two or more compressors connected in series and a control mechanism. The control mechanism is controlled by a performance controller. The performance controller is operable to identify a process variable of the performance controller; receive, on a recurrent basis from a load sharing controller, a setpoint for the process variable of the performance controller; and control the control mechanism based on the setpoint and the process variable of the performance controller. The setpoint is determined dynamically during operation of the two or more compressors by the load sharing controller based on a load sharing parameter associated with the two or more compressors.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: September 3, 2019
    Assignee: Woodward, Inc.
    Inventors: Walter Grassens, Brian Eldredge
  • Load sharing control for compressors in series
    Patent number: 9695834
    Abstract: A compressor system includes a compressor train including two or more compressors connected in series and a control mechanism. The control mechanism is controlled by a performance controller. The performance controller is operable to identify a process variable of the performance controller; receive, on a recurrent basis from a load sharing controller, a setpoint for the process variable of the performance controller; and control the control mechanism based on the setpoint and the process variable of the performance controller. The setpoint is determined dynamically during operation of the two or more compressors by the load sharing controller based on a load sharing parameter associated with the two or more compressors.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: July 4, 2017
    Assignee: Woodward, Inc.
    Inventors: Walter Grassens, Brian Eldredge
  • LOAD SHARING CONTROL FOR COMPRESSORS IN SERIES
    Publication number: 20170152856
    Abstract: In some aspects, a compressor system includes a compressor train including two or more compressors connected in series and a control mechanism. The control mechanism is controlled by a performance controller. The performance controller is operable to identify a process variable of the performance controller; receive, on a recurrent basis from a load sharing controller, a setpoint for the process variable of the performance controller; and control the control mechanism based on the setpoint and the process variable of the performance controller. The setpoint is determined dynamically during operation of the two or more compressors by the load sharing controller based on a load sharing parameter associated with the two or more compressors.
    Type: Application
    Filed: February 9, 2017
    Publication date: June 1, 2017
    Inventors: Walter Grassens, Brian Eldredge
  • Load Sharing Control for Compressors in Series
    Publication number: 20150147193
    Abstract: In some aspects, a compressor system includes a compressor train including two or more compressors connected in series and a control mechanism. The control mechanism is controlled by a performance controller. The performance controller is operable to identify a process variable of the performance controller; receive, on a recurrent basis from a load sharing controller, a setpoint for the process variable of the performance controller; and control the control mechanism based on the setpoint and the process variable of the performance controller. The setpoint is determined dynamically during operation of the two or more compressors by the load sharing controller based on a load sharing parameter associated with the two or more compressors.
    Type: Application
    Filed: November 25, 2013
    Publication date: May 28, 2015
    Applicant: Woodward, Inc.
    Inventors: Walter Grassens, Brian Eldredge