Patents by Inventor Greg A. Ferkol

Greg A. Ferkol 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).

  • Electrohydraulic control system
    Patent number: 7130721
    Abstract: Consistent with an aspect of the disclosure, a method for controlling a hydraulic cylinder is provided. The hydraulic cylinder is provided with a chamber and configured to receive fluid from a valve. The method includes receiving a user input and determining a desired velocity of the hydraulic cylinder in accordance with the user input. In addition, the velocity of the hydraulic cylinder is measured and a position of the valve is determined in accordance with the desired velocity of the hydraulic cylinder and the measured velocity of the hydraulic cylinder. The method further includes determining a desired force to be applied to the valve in accordance with a difference between the desired and measured velocities of the hydraulic cylinder, and actuating the valve in accordance with the desired force to thereby inject the fluid into the chamber and move the hydraulic cylinder.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: October 31, 2006
    Assignee: Caterpillar Inc
    Inventors: Jerry A. Wear, Hongliu Du, Greg A. Ferkol, Mark P. Vonderwell, Jeff L. Kuehn, Jason L. Brinkman
  • Electrohydraulic control system
    Publication number: 20060095163
    Abstract: Consistent with an aspect of the disclosure, a method for controlling a hydraulic cylinder is provided. The hydraulic cylinder is provided with a chamber and configured to receive fluid from a valve. The method includes receiving a user input and determining a desired velocity of the hydraulic cylinder in accordance with the user input. In addition, the velocity of the hydraulic cylinder is measured and a position of the valve is determined in accordance with the desired velocity of the hydraulic cylinder and the measured velocity of the hydraulic cylinder. The method further includes determining a desired force to be applied to the valve in accordance with a difference between the desired and measured velocities of the hydraulic cylinder, and actuating the valve in accordance with the desired force to thereby inject the fluid into the chamber and move the hydraulic cylinder.
    Type: Application
    Filed: October 29, 2004
    Publication date: May 4, 2006
    Inventors: Jerry Wear, Hongliu Du, Greg Ferkol, Mark Vonderwell, Jeff Kuehn, Jason Brinkman