Patents by Inventor James Lee Snowbarger

James Lee 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).

  • VALVE POSITIONER WITH OVERPRESSURE PROTECTION CAPABILITIES
    Publication number: 20150192931
    Abstract: A method of limiting control pressure provided to an actuator of a valve coupled to a valve positioner, a drive signal is provided to a pneumatic stage of the valve positioner. The pneumatic stage is arranged to control output pressure of the valve positioner in accordance with the drive signal. A pressure measurement from a pressure sensor communicatively coupled to the valve positioner is obtained, and an abnormal pressure is detected based on the pressure measurement. In response to detecting the abnormal pressure, the drive signal is controlled so as to limit the output pressure of the valve positioner, wherein the output pressure provides control pressure to the actuator.
    Type: Application
    Filed: January 9, 2014
    Publication date: July 9, 2015
    Applicant: FISHER CONTROLS INTERNATIONAL LLC
    Inventors: Bruce Frederick Grumstrup, Lorin Dorin Miller, James Lee Snowbarger, Adam Joseph Wittkop