Patents by Inventor David C. Wachter

David C. Wachter 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).

  • Steering system
    Patent number: 6129170
    Abstract: A steering system for an articulated steered mobile work machine has a first sensor for sensing the relative angular position of first and second machine sections and a second sensor for sensing the relative angular position of second and a third machine sections. A controller determines for a sensed relative angle of the first and second machine sections the desired relative steering angle of the second and third sections and actuates a second control valve to direct fluid flow to a second pair of fluid operated jacks and pivot the third machine section to a desired angular position relative to the second machine section. The second sensor provides feedback as to the relative angular position of the second and third machine sections.
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: October 10, 2000
    Assignee: Caterpillar Inc.
    Inventors: Alan J. Hickman, David C. Wachter
  • Steering system
    Patent number: 6016885
    Abstract: A steering system for an articulated steered mobile work machine has a first sensor for sensing the relative angular position of first and second machine sections and a second sensor for sensing the relative angular position of second and a third machine sections. A controller determines for a sensed relative angle of the first and second machine sections the desired relative steering angle of the second and third sections and actuates a second control valve to direct fluid flow to a second pair of fluid operated jacks and pivot the third machine section to a desired angular position relative to the second machine section. The second sensor provides feedback as to the relative angular position of the second and third machine sections.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: January 25, 2000
    Assignee: Caterpillar Inc.
    Inventors: Alan J. Hickman, David C. Wachter