Patents by Inventor David D. Reagan

David D. Reagan 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).

  • Method of offset voltage control for bipolar ionization systems
    Patent number: 6826030
    Abstract: A method of offset voltage control for pulse mode ionization systems is provided wherein the ionization system has positive and negative power supplies. The duty cycle and overlap of outputs of the positive and negative power supplies are controlled, and an overlap that achieves a desired offset voltage is determined. The offset voltage and the corresponding overlap are stored in memory. The duty cycle and overlap of the outputs of the positive and negative power supplies are controlled to achieve the desired offset voltage based upon the stored offset voltage comparison.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: November 30, 2004
    Assignee: Illinois Tool Works Inc.
    Inventors: John Gorczyca, David D. Reagan
  • Method of offset voltage control for bipolar ionization systems
    Publication number: 20040057190
    Abstract: A method of offset voltage control for pulse mode ionization systems is provided wherein the ionization system has positive and negative power supplies. The duty cycle and overlap of outputs of the positive and negative power supplies are controlled, and an overlap that achieves a desired offset voltage is determined. The offset voltage and the corresponding overlap are stored in memory. The duty cycle and overlap of the outputs of the positive and negative power supplies are controlled to achieve the desired offset voltage based upon the stored offset voltage comparison.
    Type: Application
    Filed: September 11, 2003
    Publication date: March 25, 2004
    Applicant: Illinois Tool Works Inc.
    Inventors: John Gorczyca, David D. Reagan