Patents by Inventor Sara K. Michels

Sara K. Michels 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).

  • Ash detection in diesel particulate filter
    Patent number: 8470070
    Abstract: Detecting ash in a diesel particulate filter includes receiving data indicative of signal attenuation for ash-responsive and ash-insensitive RF signals transmitted through a diesel particulate filter containing trapped soot and ash. A difference between the RF signals, such as a difference in signal attenuation, may be leveraged to detect a relative ash loading state or a change in relative ash loading state of the diesel particulate filter, and responsively indicate that filter cleaning is needed.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: June 25, 2013
    Assignee: Caterpillar Inc.
    Inventors: Vadiraj P. Kulkarni, Matthew E. Leustek, Sara K. Michels, Rajesh N. Nair, Michael A. Snopko, Andrew A. Knitt
  • Ash Detection In Diesel Particulate Filter
    Publication number: 20120017570
    Abstract: Detecting ash in a diesel particulate filter includes receiving data indicative of signal attenuation for ash-responsive and ash-insensitive RF signals transmitted through a diesel particulate filter containing trapped soot and ash. A difference between the RF signals, such as a difference in signal attenuation, may be leveraged to detect a relative ash loading state or a change in relative ash loading state of the diesel particulate filter, and responsively indicate that filter cleaning is needed.
    Type: Application
    Filed: July 22, 2010
    Publication date: January 26, 2012
    Applicant: CATERPILLAR INC.
    Inventors: Vadiraj P. Kulkarni, Matthew E. Leustek, Sara K. Michels, Rajesh N. Nair, Michael A. Snopko, Andrew A. Knitt