Patents by Inventor Dave Buttery

Dave Buttery 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).

  • Automotive windshield wiper blade with service life indicator
    Patent number: 6047436
    Abstract: An improved windshield wiper system having a cumulative ozone indicator (20) disposed in proximity to a wiper blade (10) which gives a visual cue when the wiper blade (10) should be replaced. The exposure to a predetermined amount of ozone causes the indicator (20) to change its color and thus communicate to the vehicle operator that it is time to change wiper blade (10). Rather than changing color the indicator (20) can be a pop up device which can be observed by the vehicle operator. To allow a reaction with ozone but to prevent damage from contact with a liquid the indicator (20) is covered with a gas permeable and liquid impermeable material.
    Type: Grant
    Filed: November 11, 1997
    Date of Patent: April 11, 2000
    Assignee: AlliedSignal Inc.
    Inventors: Ronald P. Rohrbach, Daniel E. Bause, Dave Buttery, Gordon W. Jones, Peter D. Unger, Russell A. Dondero