Patents by Inventor George Madsen Robertson

George Madsen Robertson 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).

  • Loader linkage
    Patent number: 6957705
    Abstract: A Z-bar loader linkage having a floating bell crank. A boom is pivotally mounted to a loader frame at one end and an attachment at the other end. The bell crank is pivotally mounted on leveling links extending forwardly from the loader frame. The drive end of the bell crank is provided with an attachment link that extends from the bell crank to the attachment for controlling the angular position of the attachment. A guide link extends between the attachment link and the boom.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: October 25, 2005
    Assignee: Deere & Company
    Inventors: David Michael O'Brien, Gregory Keith Werner, Michael Dean Worley, George Madsen Robertson, Dusan John Hvolka