Patents by Inventor Jim B. Maddock

Jim B. Maddock 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).

  • Automatic solenoid control valve calibration
    Patent number: 5762475
    Abstract: A calibration apparatus and method for calibrating a hydraulic control valve connected to an electronic controller. The electronic controller selects control signals and reads corresponding hydraulic pressure outputs of the hydraulic control valve and selectively records values corresponding to control signals that produce desired calibration pressures.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: June 9, 1998
    Assignee: Caterpillar Inc.
    Inventors: Jim B. Maddock, Brian W. Mann, David R. Meinhold