Patents by Inventor Garrie Huisenga

Garrie Huisenga 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).

  • Process equipment validation
    Patent number: 7464721
    Abstract: A Safety Instrumented System for use with a process control system receives pressure of process fluid in the process piping. A valve positioner positions a valve which controls flow of process fluid through the process piping. The valve positioner is caused to perform a partial stroke of the valve or otherwise introduce a perturbation into the process. A resulting change in sensed pressure due to the perturbation is used to diagnose operation of the process.
    Type: Grant
    Filed: June 14, 2004
    Date of Patent: December 16, 2008
    Assignee: Rosemount Inc.
    Inventors: Dale Perry, Mark Schumacher, Garrie Huisenga, Randy Longsdorf
  • Process device with loop override
    Patent number: 7098798
    Abstract: A process device for use in a process control system includes output circuitry configured to couple to a process control loop. The output circuitry controls electrical current through the loop. Loop override circuitry is configured to override operation of the output circuitry and set the electrical current in the loop to a desired level.
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: August 29, 2006
    Assignee: Rosemount Inc.
    Inventors: Garrie Huisenga, Randy Longsdorf
  • Process equipment validation
    Publication number: 20050274417
    Abstract: A Safety Instrumented System for use with a process control system receives pressure of process fluid in the process piping. A valve positioner positions a valve which controls flow of process fluid through the process piping. The valve positioner is caused to perform a partial stroke of the valve or otherwise introduce a perturbation into the process. A resulting change in sensed pressure due to the perturbation is used to diagnose operation of the process.
    Type: Application
    Filed: June 14, 2004
    Publication date: December 15, 2005
    Applicant: Rosemount Inc.
    Inventors: Dale Perry, Mark Schumacher, Garrie Huisenga, Randy Longsdorf
  • ANALOG-TO-DIGITAL CONVERTER WITH RANGE ERROR DETECTION
    Publication number: 20050248477
    Abstract: A circuit includes a multiplexer, an analog-to-digital converter, and a processor that compares a sequence of digital outputs from the analog-to-digital converter to a sequence of normal ranges that correspond with the digital outputs in order to provide an error output when one of the digital outputs is outside its normal range.
    Type: Application
    Filed: April 21, 2004
    Publication date: November 10, 2005
    Applicant: Rosemount Inc.
    Inventors: Jonathon Jongsma, Garrie Huisenga
  • Process device with switching power supply
    Publication number: 20050231182
    Abstract: A process field device for coupling to a two wire process control loop includes a field device circuitry and a switching regulator to power the circuitry. A series regulator provides a regulated supply voltage to the switching regulator. A noise filter reduces the amount of noise from the switching regulator which enters the two wire process control loop.
    Type: Application
    Filed: April 15, 2004
    Publication date: October 20, 2005
    Inventors: Garrie Huisenga, James Johnson, Jonathon Jongsma
  • Process control loop current verification
    Publication number: 20050168343
    Abstract: A process device is configured for coupling to a two wire process control loop. Loop current output circuitry is configured to apply an output current to the two wire process control loop. Loop current verification circuitry is coupled to the two wire process control loop and configured to detect errors in the applied output current. At least a portion of the loop current verification circuitry is independent from the loop current output circuitry.
    Type: Application
    Filed: March 31, 2005
    Publication date: August 4, 2005
    Inventors: Randy Longsdorf, Garrie Huisenga, James Johnson
  • Process device with loop override
    Publication number: 20050030186
    Abstract: A process device for use in a process control system includes output circuitry configured to couple to a process control loop. The output circuitry controls electrical current through the loop. Loop override circuitry is configured to override operation of the output circuitry and set the electrical current in the loop to a desired level.
    Type: Application
    Filed: December 11, 2003
    Publication date: February 10, 2005
    Inventors: Garrie Huisenga, Randy Longsdorf
  • Process device with quiescent current diagnostics
    Publication number: 20050030185
    Abstract: A process device for use on an industrial process control system includes a quiescent current sensor configured to sense quiescent current draw of the process device. Diagnostic circuitry determines a diagnostic condition of the process device as a function of the sensed quiescent current.
    Type: Application
    Filed: August 7, 2003
    Publication date: February 10, 2005
    Inventors: Garrie Huisenga, Randy Longsdorf