Patents by Inventor Stephen Howard Waters

Stephen Howard Waters 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).

  • Low current extended duration spark ignition system
    Patent number: 6935323
    Abstract: A system for firing a spark plug is disclosed. The system includes a timing controller configured to send a first timing signal and a second timing signal. The system also includes an ignition transformer having a primary winding and a secondary winding and a spark-plug that is operably associated with the secondary winding. A first switching element is disposed between the timing controller and the primary winding of the ignition transformer. The first switching element controls a supply of power to the primary winding based on the first timing signal. Also, a second switching element is disposed between the timing controller and the primary winding of the ignition transformer. The second switching element controls the supply of power to the primary winding based on the second timing signal. A method for firing a spark plug is also disclosed.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: August 30, 2005
    Assignee: Caterpillar Inc
    Inventors: Stephen Howard Waters, Anthony Kok-Fai Chan