Patents by Inventor David J. Glidden

David J. Glidden 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).

  • Modulated voltage for a solenoid valve
    Patent number: 6493204
    Abstract: A circuit for actuating an ABS solenoid valve coil with a pulse width modulated voltage having a constant frequency and variable duty cycle. The coil current is a function of the duty cycle of the pulse width modulated voltage. By controlling the duty cycle, current saturation of the coil can be avoided to provide for a faster response upon deactuation of the coil. Feedback is included in the circuit to verify correct functioning of electrical components.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: December 10, 2002
    Assignee: Kelsey-Hayes Company
    Inventors: David J. Glidden, Daniel D. Moore, Gary P. Whelan