Patents by Inventor Dennis Roy Yarnold

Dennis Roy Yarnold 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).

  • Engine cleaning
    Patent number: 6289905
    Abstract: A reservoir for re-usable cleaning fluid and filter for filtering fluid draining into the reservoir are positioned below an engine or supported engine component positioned at a cleaning zone. Cleaning fluid is delivered to the cleaning zone from the cleaning fluid held in the reservoir and the delivered cleaning fluid then drains into the reservoir (via the filter) from the cleaning zone above the reservoir. The cleaning fluid is re-circulated and filtered for continuous use.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: September 18, 2001
    Inventor: Dennis Roy Yarnold