Patents by Inventor James L. Snowbarger

James L. Snowbarger 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).

  • Methods and apparatus for process device calibration
    Patent number: 9285057
    Abstract: Methods and apparatus are disclosed for process device calibration. An example method includes determining if a first position of a process control device is a first end position, and in response to the first position being the first end position, calculating a second end position of the process control device based on the first end position and configuration information. The example method further includes calculating a partial stroke zone of the process control device based on the first end position and the second end position, and determining when a current position of the process control device is within the partial stroke zone. The example method also includes, when the current position is within the partial stroke zone, calculating an output bias based on a control signal and a summed value.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: March 15, 2016
    Assignee: Fisher Controls International LLC
    Inventors: Stanley Felix Amirthasamy, James L. Snowbarger
  • Methods and Apparatus for Process Device Calibration
    Publication number: 20140100673
    Abstract: Methods and apparatus are disclosed for process device calibration. An example method includes determining if a first position of a process control device is a first end position, and in response to the first position being the first end position, calculating a second end position of the process control device based on the first end position and configuration information. The example method further includes calculating a partial stroke zone of the process control device based on the first end position and the second end position, and determining when a current position of the process control device is within the partial stroke zone. The example method also includes, when the current position is within the partial stroke zone, calculating an output bias based on a control signal and a summed value.
    Type: Application
    Filed: October 5, 2012
    Publication date: April 10, 2014
    Applicant: FISHER CONTROLS INTERNATIONAL LLC
    Inventors: Stanley Felix Amirthasamy, James L. Snowbarger