Patents by Inventor John Bessman

John Bessman 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).

  • Handheld testing device of nitrogen oxide sensor
    Patent number: 10539544
    Abstract: A testing device is capable of testing a NOx sensor in an environment that does not have dew point detection capability. The testing device includes a connector configured to be coupled to the NOx sensor, an output indicator, and circuitry. The circuitry is configured to send an unverified dew point signal to the NOx sensor via the connector and receive a sensor signal from the NOx sensor via the connector. The unverified dew point signal includes an indication that a temperature of the environment is at or above the dew point. The sensor signal includes an indication of operation of the NOx sensor in the environment. The circuitry is further configured to determine a status of the NOx sensor based on the received sensor signal and indicate, via the output indicator, the status of the NOx sensor.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: January 21, 2020
    Assignee: PACCAR Inc
    Inventors: John Bessman, Richard Jeffrey Currie, Michael Gerty, Nick Hertlein
  • HANDHELD TESTING DEVICE OF NITROGEN OXIDE SENSOR
    Publication number: 20170131251
    Abstract: A testing device is capable of testing a NOx sensor in an environment that does not have dew point detection capability. The testing device includes a connector configured to be coupled to the NOx sensor, an output indicator, and circuitry. The circuitry is configured to send an unverified dew point signal to the NOx sensor via the connector and receive a sensor signal from the NOx sensor via the connector. The unverified dew point signal includes an indication that a temperature of the environment is at or above the dew point. The sensor signal includes an indication of operation of the NOx sensor in the environment. The circuitry is further configured to determine a status of the NOx sensor based on the received sensor signal and indicate, via the output indicator, the status of the NOx sensor.
    Type: Application
    Filed: November 11, 2015
    Publication date: May 11, 2017
    Applicant: PACCAR Inc
    Inventors: John Bessman, Richard Jeffrey Currie, Michael Gerty, Nick Hertlein