Patents by Inventor Simon C. Litchfield

Simon C. Litchfield 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 for controlling a raise/extend function of a work machine
    Patent number: 6802687
    Abstract: A method for controlling the raise/extend function of a work machine is provided. The method comprises sensing the lateral orientation of the work machine, comparing the sensed orientation to a desired orientation and controlling the raise/extend operation in response to the actual verses the desired position.
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: October 12, 2004
    Assignee: Caterpillar Inc
    Inventors: Simon C. Litchfield, C. James Johnson
  • Method for controlling a raise/extend function of a work machine
    Publication number: 20040131458
    Abstract: A method for controlling the raise/extend function of a work machine is provided. The method comprises sensing the lateral orientation of the work machine, comparing the sensed orientation to a desired orientation and controlling the raise/extend operation in response to the actual verses the desired position.
    Type: Application
    Filed: December 18, 2002
    Publication date: July 8, 2004
    Inventors: Simon C. Litchfield, C. James Johnson
  • Method for controlling a raise/extend function of a work machine
    Publication number: 20040120800
    Abstract: A method for controlling the raise/extend function of a work machine is provided. The method comprises sensing the position of a frame and the position of a telescopic boom of the work machine, comparing the sensed positions to a desired position and controlling the raise/extend operation in response to the actual verses the desired positions.
    Type: Application
    Filed: December 18, 2002
    Publication date: June 24, 2004
    Inventors: Simon C. Litchfield, C. James Johnson